Relevant bibliographies by topics / Black hole population

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Black hole population'

Author: Grafiati
Published: 26 October 2024
Last updated: 19 July 2025

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Journal articles on the topic "Black hole population"

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Nomoto, K., K. Maeda, H. Umeda, and N. Tominaga. "Nucleosynthesis in Population III Supernovae." Highlights of Astronomy 13 (2005): 560–65. http://dx.doi.org/10.1017/s1539299600016580.

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AbstractStars more massive than ~ 20–25 M⊙ form a black hole at the end of their evolution. Stars with non-rotating black holes are likely to collapse ”quietly” ejecting a small amount of heavy elements (Faint supernovae). In contrast, stars with rotating black holes are likely to give rise to very energetic supernovae (Hypernovae). Nucleosynthesis in Hypernovae is characterized by larger abundance ratios (Zn,Co,V,Ti)/Fe and smaller (Mn,Cr)/Fe than normal supernovae, which can explain the observed trend of these ratios in extremely metal-poor stars. Nucleosynthesis in Faint supernovae is chara
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Stevenson, Simon. "Biases in Estimates of Black Hole Kicks from the Spin Distribution of Binary Black Holes." Astrophysical Journal Letters 926, no. 2 (2022): L32. http://dx.doi.org/10.3847/2041-8213/ac5252.

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Abstract A population of more than 50 binary black hole mergers has now been observed by the LIGO and Virgo gravitational-wave observatories. While neutron stars are known to have large velocities associated with impulsive kicks imparted to them at birth in supernovae, whether black holes receive similar kicks, and of what magnitude, remains an open question. Recently, Callister et al. analyzed the binary black hole population under the hypothesis that they were all formed through isolated binary evolution and claimed that large black hole kicks (greater than 260 km s−1 at 99% confidence) were
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Pesce, Dominic W., Daniel C. M. Palumbo, Angelo Ricarte, et al. "Expectations for Horizon-Scale Supermassive Black Hole Population Studies with the ngEHT." Galaxies 10, no. 6 (2022): 109. http://dx.doi.org/10.3390/galaxies10060109.

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We present estimates for the number of supermassive black holes (SMBHs) for which the next-generation Event Horizon Telescope (ngEHT) can identify the black hole “shadow”, along with estimates for how many black hole masses and spins the ngEHT can expect to constrain using measurements of horizon-resolved emission structure. Building on prior theoretical studies of SMBH accretion flows and analyses carried out by the Event Horizon Telescope (EHT) collaboration, we construct a simple geometric model for the polarized emission structure around a black hole, and we associate parameters of this mo
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Callister, Thomas A., Simona J. Miller, Katerina Chatziioannou, and Will M. Farr. "No Evidence that the Majority of Black Holes in Binaries Have Zero Spin." Astrophysical Journal Letters 937, no. 1 (2022): L13. http://dx.doi.org/10.3847/2041-8213/ac847e.

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Abstract The spin properties of merging black holes observed with gravitational waves can offer novel information about the origin of these systems. The magnitudes and orientations of black hole spins offer a record of binaries’ evolutionary history, encoding information about massive stellar evolution and the astrophysical environments in which binary black holes are assembled. Recent analyses of the binary black hole population have yielded conflicting portraits of the black hole spin distribution. Some works suggest that black hole spins are small but nonzero and exhibit a wide range of mis
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Rees, Martin J., and Marta Volonteri. "Massive black holes: formation and evolution." Proceedings of the International Astronomical Union 2, S238 (2006): 51–58. http://dx.doi.org/10.1017/s1743921307004681.

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AbstractSupermassive black holes are nowadays believed to reside in most local galaxies. Observations have revealed us vast information on the population of local and distant black holes, but the detailed physical properties of these dark massive objects are still to be proven. Accretion of gas and black hole mergers play a fundamental role in determining the two parameters defining a black hole: mass and spin. We briefly review here the basic properties of the population of supermassive black holes, focusing on the still mysterious formation of the first massive black holes, and their evoluti
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Bartos, Imre, Bence Kocsis, Zoltán Haiman, and Szabolcs Márka. "Rapid and Bright Stellar-mass Binary Black Hole Mergers in Active Galactic Nuclei." Astrophysical Journal 835, no. 2 (2016): 165. https://doi.org/10.5281/zenodo.437531.

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The Laser Interferometer Gravitational-wave Observatory (LIGO) found direct evidence for double black hole binaries emitting gravitational waves. Galactic nuclei are expected to harbor the densest population of stellar-mass black holes. A significant fraction (∼ 30 % ) of these black holes can reside in binaries. We examine the fate of the black hole binaries in active galactic nuclei, which get trapped in the inner region of the accretion disk around the central supermassive black hole. We show that binary black holes can migrate into and then rapidly merge within the disk well within a S
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Doctor, Zoheyr, Ben Farr, and Daniel E. Holz. "Black Hole Leftovers: The Remnant Population from Binary Black Hole Mergers." Astrophysical Journal Letters 914, no. 1 (2021): L18. http://dx.doi.org/10.3847/2041-8213/ac0334.

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Reynolds, Christopher S. "Observational Constraints on Black Hole Spin." Annual Review of Astronomy and Astrophysics 59, no. 1 (2021): 117–54. http://dx.doi.org/10.1146/annurev-astro-112420-035022.

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The spin of a black hole is an important quantity to study, providing a window into the processes by which a black hole was born and grew. Furthermore, spin can be a potent energy source for powering relativistic jets and energetic particle acceleration. In this review, I describe the techniques currently used to detect and measure the spins of black holes. It is shown that: ▪ Two well-understood techniques, X-ray reflection spectroscopy and thermal continuum fitting, can be used to measure the spins of black holes that are accreting at moderate rates. There is a rich set of other electromagne
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Treister, Ezequiel, Claudia M. Urry, Kevin Schawinski, Brooke D. Simmons, Priyamvada Natarajan, and Marta Volonteri. "The Multiwavelength AGN Population and the X-ray Background." Proceedings of the International Astronomical Union 9, S304 (2013): 188–94. http://dx.doi.org/10.1017/s1743921314003731.

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AbstractIn order to fully understand galaxy formation we need to know when in the cosmic history are supermassive black holes (SMBHs) growing more intensively, in what type of galaxies this growth is happening and what fraction of these sources are invisible at most wavelengths due to obscuration. Active Galactic Nuclei (AGN) population synthesis models that can explain the spectral shape and intensity of the cosmic X-ray background (CXRB) indicate that most of the SMBH growth occurs in moderate-luminosity (LX~ 1044 erg/s) sources (Seyfert-type AGN), at z~ 0.5−1 and in heavily obscured but Com
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Zevin, Michael, and Daniel E. Holz. "Avoiding a Cluster Catastrophe: Retention Efficiency and the Binary Black Hole Mass Spectrum." Astrophysical Journal Letters 935, no. 1 (2022): L20. http://dx.doi.org/10.3847/2041-8213/ac853d.

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Abstract The population of binary black hole mergers identified through gravitational waves has uncovered unexpected features in the intrinsic properties of black holes in the universe. One particularly surprising and exciting result is the possible existence of black holes in the pair-instability mass gap, ∼50–120 M ⊙. Dense stellar environments can populate this region of mass space through hierarchical mergers, with the retention efficiency of black hole merger products strongly dependent on the escape velocity of the host environment. We use simple toy models to represent hierarchical merg
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Dissertations / Theses on the topic "Black hole population"

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Plowman, Joseph Eugene. "Constraining massive black hole population models with gravitational wave observations." Thesis, Montana State University, 2010. http://etd.lib.montana.edu/etd/2010/plowman/PlowmanJ0510.pdf.

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A number of scenarios have been proposed for the origin of the supermassive black holes (SMBHs) that are found in the centres of most galaxies. Many such scenarios predict a high-redshift population of massive black holes (MBHs), with masses in the range 10² to 10⁵ times that of the Sun. When the Laser Interferometer Space Antenna (LISA) is finally operational, it is likely that it will detect on the order of 100 of these MBH binaries as they merge. The differences between proposed population models produce appreciable effects in the portion of the population which is
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Buchner, Johannes. "On the obscuration of the growing supermassive black hole population." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-181878.

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Aktive Galaxienkerne (AGN) werden durch das Wachstum super-schwere schwarze Löcher, die im Zentrum jeder massiven Galaxie sitzen, betrieben. Da enge Korrelationen ihrer Massen zu Eigenschaften der elliptischen Galaxienkomponente beobachtet werden, und durch ihre extreme Leuchtkraft ist es naheliegend, dass AGN einen wichtigen Baustein von Galaxien bilden. Der erste Schritt, AGN zu verstehen ist es, ihre Häufigkeit zu ermitteln, sowie die Leuchtkraft der Population. Dieses Unterfangen wird dadurch erschwert, dass die meisten AGN von Gas und Staub umgeben sind. Selbst im energiereichen Röntgenbe
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Buchner, Johannes [Verfasser], and Kirpal [Akademischer Betreuer] Nandra. "On the obscuration of the growing supermassive black hole population / Johannes Buchner. Betreuer: Kirpal Nandra." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1070762989/34.

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Pierra, Grégoire. "Cosmologie avec les sirènes sombres et populations de binaires de trous noirs avec les ondes gravitationnelles de LIGO-Virgo-KAGRA." Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10162.

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Les ondes gravitationnelles constituent une nouvelle sonde pour explorer l’Univers et étudier des phénomènes cosmiques jusque-là inaccessibles. Cette thèse se base sur des données d’ondes gravitationnelles récoltées par les détecteurs de la collaboration scientifique LIGO-Virgo-KAGRA. La première partie de ce travail porte sur la cosmologie avec les sirènes sombres, une méthode qui utilise les fusions de trous noirs pour mesurer les distances cosmologiques et inférer la valeur de la constante de Hubble, sans nécessiter de contrepartie électromagnétique. Elle présente également ICAROGW, un code
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Higgins, Jennifer C. "Survival, Home Range and Spatial Relationships of Virginia's Exploited Black Bear Population." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36765.

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Eighty-three (21M, 62F) of 194 black bears captured during 1994-1996 were equipped with radio collars. Annual survival rates estimated with Kaplain-Meier staggered entry approach for radio collared adult females, adult males, subadult females, and subadult males were 95.3, 100.0, 90.4 and 50.0% respectively. Hunting, handling, vehicle collisions, and natural causes accounted for 81.0, 11.1, 3.2, and 1.6% of mortality. Twenty, 9.8, and 70.6 % of bears harvested were harvested in the deer firearm season, the deer archery season, and the bear firearm season, respectively. Twenty-three cubs we
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Jones, Michael D. "DNA-based Population Estimation, Harvest Vulnerability, and Home Range Dynamics of Black Bears in Western Maryland." Thesis, West Virginia University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1522522.

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<p> After nearly being extirpated from the state, black bears in Maryland have rebounded to a point where recreational harvest has now become an important management tool. Having a better understanding of bear population parameters, movements, and harvest vulnerability allows managers to implement hunting more effectively and responsibly. To estimate demographics of the Maryland bear population, we implemented noninvasive genetic sampling of bear hair during summer 2011. We used a model-based sampling design that allowed us to collect samples more efficiently. We used presence-only maximum ent
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Volonteri, Marta, Amy E. Reines, Hakim Atek, Daniel P. Stark, and Maxime Trebitsch. "High-redshift Galaxies and Black Holes Detectable with the JWST: A Population Synthesis Model from Infrared to X-Rays." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626181.

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The first billion years of the Universe has been a pivotal time: stars, black holes (BHs), and galaxies formed and assembled, sowing the seeds of galaxies as we know them today. Detecting, identifying, and understanding the first galaxies and BHs is one of the current observational and theoretical challenges in galaxy formation. In this paper we present a population synthesis model aimed at galaxies, BHs, and active galactic nuclei (AGNs) at high redshift. The model builds a population based on empirical relations. The spectral energy distribution of galaxies is determined by age and metallici
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Kinugawa, Tomoya. "The binary population synthesis in the early universe and the detection rate of gravitational waves from the binary black holes." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215304.

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Charisi, Maria. "A Population of Short-Period Variable Quasars from PTF as Supermassive Black Hole Binary Candidates." Thesis, 2017. https://doi.org/10.7916/D88S52C3.

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Supermassive black hole binaries (SMBHBs) are the natural consequence of galaxy mergers and should form frequently in galactic nuclei. Especially at sub-parsec separations, where the binary evolution is slow, SMBHBs should be fairly abundant. However, the observational evidence remains elusive. In this thesis, we focus on periodic variability of quasars as a potential signature of compact SMBHBs. First, we present a systematic search for periodic variability in the photometric database of the Palomar Transient Factory. Our search in a large sample of ~35,000 quasars returned 50 candidate
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Singh, Neha. "Exploring compact binary populations with Einstein Telescope." Doctoral thesis, 2021. https://depotuw.ceon.pl/handle/item/4091.

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Einstein Telescope (ET) is a future third-generation gravitational wave detector consisting of three overlapping interferometers, arranged in an equilateral configuration with arm-opening angles of 60 degrees. We perform a joint analysis of short duration gravitational wave signals from compact binary systems, long duration signals from compact binary systems and also analyse the Pop I and Pop II, Pop III and globular cluster compact binary mergers using the current design of the ET. We study the capability of ET as a single instrument for this analysis. The observation with a single instrumen
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Books on the topic "Black hole population"

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Charisi, Maria. A Population of Short-Period Variable Quasars from PTF as Supermassive Black Hole Binary Candidates. [publisher not identified], 2017.

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Clark, Christopher J. Gaining Voice. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190933562.001.0001.

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This book adopts a multifaceted approach to study of black state legislators across the country. Using the descriptive representation framework, multiple facets of black representation are studied. Black seat share is the primary facet considered, and it is measured as the proportion of seats held by blacks in the state legislature. The black representation ratio measures the black seat share relative to the black population share. Parity exists when blacks are represented in the state legislature at a rate that matches their population share. Legislative black caucuses are also studied in thi
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Archer, Richard. The World of Hosea Easton and David Walker. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190676643.003.0001.

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Hosea Easton and David Walker described and analyzed racism in New England during the late 1820s. New England had initially been more receptive to its black population than were other sections of the United States, but as their populations of free people of African descent dramatically increased, states began to reverse themselves. By the 1820s, laws forbade free people of African descent from marrying whites, employment was limited to the most menial jobs, and education—where available—was inadequate. African Americans could not serve on juries or hold public office. Their housing opportuniti
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Brown, Karida L. Gone Home. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469647036.001.0001.

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Since the 2016 presidential election, Americans have witnessed countless stories about Appalachia: its changing political leanings, its opioid crisis, its increasing joblessness, and its declining population. These stories, however, largely ignore black Appalachian lives. Karida L. Brown’s Gone Home offers a much-needed corrective to the current whitewashing of Appalachia. In telling the stories of African Americans living and working in Appalachian coal towns, Brown offers a sweeping look at race, identity, changes in politics and policy, and black migration in the region and beyond. Drawn fr
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Edwards, Erica R. The Other Side of Terror. NYU Press, 2021. http://dx.doi.org/10.18574/nyu/9781479808427.001.0001.

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The year 1968 was the height of the worldwide Black liberation struggle and the beginning of a new era in Black studies and Black culture in the United States. It also marked a turning point for the global reach of US power, which was built on the counterinsurgency honed on Black and other oppressed populations at home. The next five decades consolidated the culture of US empire, with the imperial grammars of Blackness justifying the domestic carceral regime and US and US-backed wars and occupations abroad. This study reveals the troubling ways that the long war on terror relied on the labor a
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Howe, Jonathan E. Playing the Game, Self-Presentation, and Black Male College Athletes. Lexington Books, 2025. https://doi.org/10.5040/9781978748125.

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Black male college athletes are among the most recognizable individuals within a collegiate setting—particularly in relation to their athletic abilities. Consequently, the knowledge shared of this population’s experiences is often constrained to those athletic pursuits, which can minimize and delegitimize their holistic experiences, including encountering anti-Black racism, identity development and negotiation, and the navigation of their varied environments. Playing the Game, Self-Presentation, and Black Male College Athletes: A Critical Understanding of the Holistic Experience by Jonathan E.
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Bullock, III, Charles S., Susan A. MacManus, Jeremy D. Mayer, and Mark J. Rozell. African American Statewide Candidates in the New South. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780197607428.001.0001.

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African American candidates for statewide office in the United States face unique challenges given the nation’s complicated racial dynamics. At the dawn of the twenty-first century, the United States had elected only one African American as governor in its history—L. Douglas Wilder, a grandson of slaves who achieved this historic goal in 1989 in Virginia, once the capital of the Confederacy. Numerous media accounts at the time declared a major breakthrough in racial politics in the United States with one national news magazine actually featuring in bold type on its cover “The End of the Civil
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Lovett, Marilyn D. Africana Health Psychology. The Rowman & Littlefield Publishing Group, 2023. https://doi.org/10.5040/9781666983906.

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Africana Health Psychology: A Cultural Perspective consists of a discussion of health psychology among populations of African descent throughout the diaspora and includes those living in the US such as Caribbean and continental Africans of color. The focus of this work is on health equity with an emphasis on cultural affirmation as protective factors. This book is unique because it merges Africana/Black psychology and health psychology, endorses a strength-based, rather than a deficits-based model of health among Black people, and describes research consisting solely of African-descended parti
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Monforti, Jessica Lavariega. One Hundred Years since Women’s Suffrage. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190265144.003.0006.

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One hundred years since women won the right to vote in federal elections, the representation of women in elected office falls far below proportionality. The disparity is even greater for women of color: while significant proportions of the US population are Asian American, Black, and Latina women, few women of color hold elective office. Of the ninety-seven women who were elected in 2012 and are serving in the 113th Congress, only nine are Latina. These women are often marginalized by both their ethnorace and their gender. This chapter examines one hundred years of Latina political candidates,
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van Rooy, Bertus. English in South Africa. Edited by Markku Filppula, Juhani Klemola, and Devyani Sharma. Oxford University Press, 2014. http://dx.doi.org/10.1093/oxfordhb/9780199777716.013.017.

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South African English (SAfE) traces its roots to the 1820 British settlers. From here, it spread to the descendants of Indian indentured labourers, who later shifted to English as home language. English diffused as second language to the indigenous African population and speakers of Afrikaans, and today occupies an important position as language of government, education, business, and the media. SAfE has borrowed vocabulary from Afrikaans, ancestral Indian languages, and in recent years also from other South African languages. Phonetically, SAfE has raised front vowels, the short front /i/ has
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Book chapters on the topic "Black hole population"

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De Zeeuw, P. T. "Central Black Holes and Dark Halos in Elliptical Galaxies." In Stellar Populations. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0125-7_20.

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Elder, Jamee. "Theory Testing in Gravitational-Wave Astrophysics." In Synthese Library. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-26618-8_4.

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AbstractThe LIGO-Virgo Collaboration achieved the first ‘direct detection’ of gravitational waves in 2015, opening a new “window” for observing the universe. Since this first detection (‘GW150914’), dozens of detections have followed, mostly produced by binary black hole mergers. However, the theory-ladenness of the LIGO-Virgo methods for observing these events leads to a potentially-vicious circularity, where general relativistic assumptions may serve to mask phenomena that are inconsistent with general relativity (GR). Under such circumstances, the fact that GR can ‘save the phenomena’ may be an artifact of theory-laden methodology.This paper examines several ways that the LIGO-Virgo observations are used in theory and hypothesis testing, despite this circularity problem. First, despite the threat of vicious circularity, these experiments succeed in testing GR. Indeed, early tests of GR using GW150914 are best understood as a response to the threat of theory-ladenness and circularity. Each test searches for evidence that LIGO-Virgo’s theory-laden methods are biasing their overall conclusions. The failure to find evidence of this places constraints on deviations from the predictions of GR. Second, these observations provide a basis for studying astrophysical and cosmological processes, especially through analyses of populations of events. As gravitational-wave astrophysics transitions into mature science, constraints from early tests of GR provide a scaffolding for these population-based studies. I further characterize this transition in terms of its increasing connectedness to other parts of astrophysics and the prominence of reasoning about selection effects and other systematics in drawing inferences from observations.Overall, this paper analyses the ways that theory and hypothesis testing operate in gravitational-wave astrophysics as it gains maturity. In particular, I show how these tests build on one another in order to mitigate a circularity problem at the heart of the observations.
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Moran, Edward C. "Distant X-Ray Galaxies: Insights from the Local Population." In Supermassive Black Holes in the Distant Universe. Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2471-9_7.

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Haardt, Francesco. "From Population III Stars to (Super)Massive Black Holes." In The Initial Mass Function 50 Years Later. Springer Netherlands, 2005. http://dx.doi.org/10.1007/978-1-4020-3407-7_93.

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King, Chris N., Anna C. Church, Wesley L. James, Rhonda G. Okoth, and Karen C. Matthews. "Birth Weight Outcomes for Non-Hispanic Black Women in a Home Visiting Program in Rural Mississippi: Observations from the Field." In Population Change and Public Policy. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57069-9_5.

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Agarwal, Bhaskar. "Primordial gas collapse in the presence of radiation: direct collapse black hole or Population III star?" In Formation of the First Black Holes. WORLD SCIENTIFIC, 2019. http://dx.doi.org/10.1142/9789813227958_0006.

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Brown, Karida L. "Introduction." In Gone Home. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469647036.003.0001.

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Every mass movement can be traced through the particular conditions under which the migrant self is formed and transformed. This introduction outlines the struggle of black Americans once slavery was outlawed by asking a key question: were they subjects or citizens? Though federal laws gave the now former slaves all the rights of citizens, state and local authorities allowed and enforced segregationist policies. These, in conjunction with various economic pressures, culminated in the African American Great Migration of 1910-1970. Brown, who positions herself as a third-generation descendent of a black Kentucky population that took part in this migration, claims that the collective memory of Appalachian blacks that undertook this stepwise migration deserves more attention.
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Bolton, Charles C. "The FEPC and Black Workers." In Home Front Battles. Oxford University Press, 2024. http://dx.doi.org/10.1093/oso/9780197655610.003.0004.

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Abstract In the South, the Fair Employment Practices Committee (FEPC) proved particularly ineffectual in bringing about change. White Southerners had created a system of racial apartheid designed to legally enshrine social, legal, and economic discrimination against its Black population. FDR’s Executive Order 8802, which created the FEPC, endorsed nondiscrimination but provided few mechanisms to enforce it. The South had Black citizens who pressed for change, although challenging White supremacy in the region entailed personal risks. Most employers in the Deep South maintained discriminatory employment practices throughout the war. This chapter looks closely at three examples of how employers in the Deep South that made major contributions to war production managed to evade the requirements of Executive Order 8802 and limit Black industrial employment in the region: the Alabama Dry Dock and Shipbuilding Company in Mobile, Alabama; the Bell Bomber Plant in Marietta, Georgia; and the Ingalls Shipbuilding Corporation in Pascagoula, Mississippi.
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Brown, Karida L. "The Coming of the Coal Industry." In Gone Home. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469647036.003.0002.

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This chapter provides historical context for the book and anchors the text in place. Drawing on archival data collected form Kentucky and Alabama-based archives and oral history data collected from African Americans in the sample population, Brown describes the conditions under which the coal mining industry emerged in eastern Kentucky at the turn of the twentieth century. She also describes the economic and social conditions of black life in post-Reconstruction Alabama. Through this historical analysis, Brown reveals the antecedents of the mass migration of African Americans from the Alabama black belt into the coalfields of eastern Kentucky. Moving beyond the individual level push-pull framework of mass migration analysis, this chapter focuses on the role of corporations and fin de siècle northern industrialists in initiating calculated mass migration streams to meet their demand for labor.
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Chu, C. Y. Cyrus. "Age-Specific Population Models: Steady States and Comparative Statics." In Population Dynamics. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195121582.003.0007.

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Mainstream demographers studying the pattern of human population are used to classifying people by their ages. In the terminology of branching processes, the type space of the stochastic process is a subset of positive real numbers that characterize human ages. This chapter deals with this case and studies the corresponding steady states and comparative statics. I showed in chapter 2 that the dynamics of any type-specific population structure can be described by the equation Nt = QNt·l and that Q is block-decomposable in the age-specific case. The fact that the northeast block of Q being a zero matrix not only helps us derive the eigen-values and eigenvectors of Q but also helps us characterize the dynamic evolution of the birth size. Let Bt be the size of birth at period t, la = p1 × • • • × pa be the probability that a person can survive to age a, and ma be the average number of births per surviving member aged a. We see that the following accounting identity must hold: which is Lotka’s (1939) well-known renewal equation. is useful for deriving the steady-state age distribution. Given the assumption of a time-invariant fertility function mu, the total size of birth Bt, which is a linear combination of birth sizes of all fertile age groups, naturally grows at a constant rate in the steady state.
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Conference papers on the topic "Black hole population"

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Maccarone, Thomas J., Arunav Kundu, Stephen E. Zepf, et al. "A Black Hole in an Extragalactic Globular Cluster." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945073.

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Sa̧dowski, Aleksander, Janusz Ziółkowski, Krzysztof Belczyński, et al. "The Missing Population of Be+Black Hole X-Ray Binaries." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945087.

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Sadowski, Aleksander. "The Missing Population of Be+Black Hole X-Ray Binaries." In 7th INTEGRAL Workshop. Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.067.0076.

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Ziolkowski, Janusz. "The Missing Population of Be+Black Hole X-Ray Binaries." In VII Microquasar Workshop: Microquasars and Beyond. Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.062.0073.

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Sa̧dowski, Aleksander, Janusz Ziółkowski, Krzysztof Belczyński, et al. "Calculations of the Galactic Population of Black Hole X-Ray Binaries." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945086.

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Soleri, P., D. Altamirano, R. Fender, et al. "Multiwavelength Observations of the Black Hole Candidate Swift J1753.5-0127." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945015.

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Meurs, Evert, Patrick Kavanagh, L. Norci, and G. O'Halloran. "Distribution and population size of Black Hole binaries in the Galaxy." In 8th INTEGRAL Workshop “The Restless Gamma-ray Universe”. Sissa Medialab, 2011. http://dx.doi.org/10.22323/1.115.0136.

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Galache, José Luis, Mike R. Garcia, Manuel P. Torres, et al. "Monitoring Black Hole X-Ray Transients in M31 with Chandra and HST." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945061.

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Gelino, Dawn M., Solen Balman, Umit Kiziloglu, et al. "The Inclination Angle and Mass of the Black Hole in XTE J1118+480." In A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP, 2008. http://dx.doi.org/10.1063/1.2945095.

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Goradzhanov, V., I. Chilingarian, M. Demianenko, et al. "Optical spectroscopy of host-galaxies of intermediate mass black holes: evolution of central black holes." In Modern astronomy: from the Early Universe to exoplanets and black holes. Special Astrophysical Observatory of the Russian Academy of Sciences, 2024. https://doi.org/10.26119/vak2024.022.

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Intermediate-mass black holes (IMBHs) with masses below ($2 \times 10^5 M_{\odot}$) are key to understanding the origin and growth mechanisms of supermassive black holes (SMBHs) in galactic nuclei. This study focuses on the search for and detailed analysis of central lightweight black holes in various galaxies. An extended sample of IMBH candidates was selected from the RCSED optical spectral catalog, followed by refined spectral observations using large telescopes, including the Magellan, SALT, Keck, and CMO telescopes. Analysis of more than 70 spectra has obtained accurate virial masses, ste
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Reports on the topic "Black hole population"

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Chen, Gengbin, Tuo Lin, Manfeng Wu, et al. Effects of repetitive transcranial magnetic stimulation on upper-limb and finger function in stroke patients: a systematic review and meta-analysis of randomized controlled trials. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.5.0121.

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Review question / Objective: P:Adult patients (age ≥ 18 years) diagnosed with stroke based on relevant clinical examination; I:Intervention group with rTMS alone or in combination with other treatments with rTMS; C:Control group received sham treatment or no rTMS; O: Upper extremity function:the Fugl-Meyer Assessment Upper Extremity (FMA-UE); Hand function:box and block test(BBT), nine-hole peg test(NHPT), and Purdue pegboard test(PPT); S:Randomized controlled trials (rather than crossover designs). Condition being studied: In Europe, more than 1 million new cases of stroke are reported each y
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DeSaix, Matthew. Bird community monitoring at New River Gorge National River, Gauley River National Recreation Area, and Bluestone National Scenic River, 1997 - 2018. National Park Service, 2022. http://dx.doi.org/10.36967/nrr-2289846.

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Birds are prominent features of National Park Service lands and are effective indicators for monitoring ecosystem health. Assessing the temporal change of avian species abundance depends on long-term monitoring of bird communities and trends, however long-term monitoring programs are generally uncommon. In this report, we summarize 22 years (1997-2018) of point count data across five sites on West Virginia National Park Service lands (three in New River Gorge National River, one in Gauley River National Recreation Area, and one in Bluestone National Scenic River) and compare these results to o
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