Relevant bibliographies by topics / Model quasar

Contents

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

Academic literature on the topic 'Model quasar'

Author: Grafiati
Published: 28 May 2022
Last updated: 30 July 2025

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Journal articles on the topic "Model quasar"

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Oogi, Taira, Motohiro Enoki, Tomoaki Ishiyama, Masakazu A. R. Kobayashi, Ryu Makiya, and Masahiro Nagashima. "The quasar clustering and its evolution in a semi-analytic model based on ultra high-resolution N-body simulations." Proceedings of the International Astronomical Union 11, S319 (2015): 61. http://dx.doi.org/10.1017/s1743921315010881.

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AbstractWe investigate clustering properties of quasars using a new version of our semi-analytic model of galaxy and quasar formation with state-of-the-art cosmological N-body simulations (Ishiyama et al. 2015; Oogi et al. 2015). We assume that a major merger of galaxies triggers quasar activity. We find that the quasar bias does not depend significantly on the quasar luminosity, similar to observed trends. This result reflects the fact that quasars with a fixed luminosity have various Eddington ratios and thus have various host halo masses that primarily determine the quasar bias. The quasar
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Li, Xiaolei, Ryan E. Keeley, Arman Shafieloo, et al. "Hubble diagram at higher redshifts: model independent calibration of quasars." Monthly Notices of the Royal Astronomical Society 507, no. 1 (2021): 919–26. http://dx.doi.org/10.1093/mnras/stab2154.

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ABSTRACT In this paper, we present a model-independent approach to calibrate the largest quasar sample. Calibrating quasar samples is essentially constraining the parameters of the linear relation between the log of the ultraviolet (UV) and X-ray luminosities. This calibration allows quasars to be used as standardized candles. There is a strong correlation between the parameters characterizing the quasar luminosity relation and the cosmological distances inferred from using quasars as standardized candles. We break this degeneracy by using Gaussian process regression to model-independently rec
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Cai, Zhenyi. "The Composite Spectral Energy Distribution of Quasars Is Surprisingly Universal Since Cosmic Noon." Universe 10, no. 11 (2024): 431. http://dx.doi.org/10.3390/universe10110431.

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Leveraging the photometric data of the Sloan Digital Sky Survey and the Galaxy Evolution Explorer (GALEX), we construct mean/median spectral energy distributions (SEDs) for unique bright quasars in redshift bins of 0.2 and up to z≃3, after taking the GALEX non-detection into account. Further correcting for the absorption of the intergalactic medium, these mean/median quasar SEDs constitute a surprisingly redshift-independent mean/median composite SED from the rest-frame optical down to ≃500 A˚ for quasars with bolometric luminosity brighter than 1045.5ergs−1. Moreover, the mean/median composit
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Fu, Yuming, Xue-Bing Wu, Yifan Li, et al. "CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE." Astrophysical Journal Supplement Series 271, no. 2 (2024): 54. http://dx.doi.org/10.3847/1538-4365/ad2ae6.

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Abstract A complete and pure sample of quasars with accurate redshifts is crucial for quasar studies and cosmology. In this paper, we present CatNorth, an improved Gaia Data Release 3 (Gaia DR3) quasar candidate catalog with more than 1.5 million sources in the 3π sky built with data from Gaia, Pan-STARRS1, and CatWISE2020. The XGBoost algorithm is used to reclassify the original Gaia DR3 quasar candidates as stars, galaxies, and quasars. To construct training/validation data sets for the classification, we carefully built two different master stellar samples in addition to the spectroscopic g
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Yue, Minghao, Xiaohui Fan, Jinyi Yang, and Feige Wang. "A Mock Catalog of Gravitationally-lensed Quasars for the LSST Survey." Astronomical Journal 163, no. 3 (2022): 139. http://dx.doi.org/10.3847/1538-3881/ac4cb0.

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Abstract We present a mock catalog of gravitationally-lensed quasars at z qso < 7.5 with simulated images for the Rubin Observatory Legacy Survey of Space and Time (LSST). We adopt recent measurements of quasar-luminosity functions to model the quasar population, and use the CosmoDC2 mock galaxy catalog to model the deflector galaxies, which successfully reproduces the observed galaxy-velocity dispersion functions up to z d ∼ 1.5. The mock catalog is highly complete for lensed quasars with Einstein radius θ E > 0.″07 and quasar absolute magnitude M i < − 20. We estimate that there are
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Macfarlane, C., P. N. Best, J. Sabater, et al. "The radio loudness of SDSS quasars from the LOFAR Two-metre Sky Survey: ubiquitous jet activity and constraints on star formation." Monthly Notices of the Royal Astronomical Society 506, no. 4 (2021): 5888–907. http://dx.doi.org/10.1093/mnras/stab1998.

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ABSTRACT We examine the distribution of radio emission from ∼42 000 quasars from the Sloan Digital Sky Survey, as measured in the LOFAR Two-metre Sky Survey (LoTSS). We present a model of the radio luminosity distribution of the quasars that assumes that every quasar displays a superposition of two sources of radio emission: active galactic nuclei (jets) and star formation. Our two-component model provides an excellent match to the observed radio flux density distributions across a wide range of redshifts and quasar optical luminosities; this suggests that the jet-launching mechanism operates
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Eilers, Anna–Christina, David W. Hogg, Bernhard Schölkopf, Daniel Foreman-Mackey, Frederick B. Davies, and Jan–Torge Schindler. "A Generative Model for Quasar Spectra." Astrophysical Journal 938, no. 1 (2022): 17. http://dx.doi.org/10.3847/1538-4357/ac8ead.

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Abstract We build a multi-output generative model for quasar spectra and the properties of their black hole engines, based on a Gaussian process latent-variable model. This model treats every quasar as a vector of latent properties such that the spectrum and all physical properties of the quasar are associated with non-linear functions of those latent parameters; the Gaussian process kernel functions define priors on the function space. Our generative model is trained with a justifiable likelihood function that allows us to treat heteroscedastic noise and missing data correctly, which is cruci
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Li, Xiaolei, Ryan E. Keeley, and Arman Shafieloo. "Redshift Evolution of the X-Ray and Ultraviolet Luminosity Relation of Quasars: Calibrated Results from SNe Ia." Astrophysical Journal 983, no. 2 (2025): 141. https://doi.org/10.3847/1538-4357/adc2fe.

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Abstract Quasars could serve as standard candles if the relation between their ultraviolet (UV) and X-ray luminosities can be accurately calibrated. Previously, we developed a model-independent method to calibrate quasar standard candles using the distance–redshift relation reconstructed from Type Ia supernovae (SNe Ia) at z < 2 using Gaussian process regression. Interestingly, we found that the calibrated quasar standard candle data set preferred a deviation from ΛCDM at redshifts above z > 2. One possible interpretation of these findings is that the calibration parameters of the quasar
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Solomon, R., and D. Stojkovic. "Variability in quasar light curves: using quasars as standard candles." Journal of Cosmology and Astroparticle Physics 2022, no. 04 (2022): 060. http://dx.doi.org/10.1088/1475-7516/2022/04/060.

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Abstract A relation between the variational slope, sF , and the mean absolute magnitude, 〈M〉, in the light curves of 58 spectroscopically confirmed quasars is measured with a dispersion of 0.15dex. Assuming it holds for quasars in general, not only does this relation add to our working knowledge of quasar variability but it also shows great promise at accurately measuring luminosity distance to a quasar in a model independent way. An accurate, model independent measure of the luminosity distance would allow quasars to be added to the cosmic distance ladder, easily extending the ladder out far
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Jin, Xin, Yanxia Zhang, Jingyi Zhang, Yongheng Zhao, Xue-bing Wu, and Dongwei Fan. "Efficient selection of quasar candidates based on optical and infrared photometric data using machine learning." Monthly Notices of the Royal Astronomical Society 485, no. 4 (2019): 4539–49. http://dx.doi.org/10.1093/mnras/stz680.

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ABSTRACT We aim to select quasar candidates based on the two large survey databases, Pan-STARRS and AllWISE. Exploring the distribution of quasars and stars in the colour spaces, we find that the combination of infrared and optical photometry is more conducive to select quasar candidates. Two new colour criterions (yW1W2 and iW1zW2) are constructed to distinguish quasars from stars efficiently. With iW1zW2, 98.30 per cent of star contamination is eliminated, while 99.50 per cent of quasars are retained, at least to the magnitude limit of our training set of stars. Based on the optical and infr
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Dissertations / Theses on the topic "Model quasar"

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Яковенко, А. В. "Квазар". Thesis, Сумський державний університет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/44007.

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Квазар - це позагалактичний об'єкт, що відрізняється високою світністю і дуже малим кутовим розміром. Це найпотужніші відомі джерела енергії в космосі. Вперше квазар був виявленийу 1962р. астрономом Маартен Шмідтоми в обсерваторії Маунт – Паломар. На разі виявлено понад 5000 квазарів, але завдяки сучасним телескопам цілком можливо виявити ще мільйони квазарів.
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Ramamonjisoa, Fidy Andriamanankasina. "Modelling radio galaxies in the Millennium simulation: SKA/MeerKAT sources and CMB contaminants." University of the Western Cape, 2010. http://hdl.handle.net/11394/2944.

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Magister Scientiae - MSc<br>We investigate the modelling of radio galaxies within a semi-analytic framework in the Millennium Simulation of the Virgo Consortium. The aim is to assess the radio sources contamination of Sunyaev-Zeldovich (SZ) signatures of clusters of galaxies in Cosmic Microwave Background (CMB) experiments. The modelling is also relevant to the Karoo Array Telescope (MeerKAT) and the Square Kilometre Array (SKA) science. The semi-analytical model consists of N-body simulation, the Millennium Run to trace the merger history of dark matter haloes within the Λ Cold Dark Matter (Λ
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Castellaro, Marco. "Quantitative neuroimaging of perfusion with arterial spin labeling: deconvolution and physiology-based models." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3423808.

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Perfusion studies with Magnetic Resonance Imaging (MRI) techniques traditionally require the injection of exogenous contrast agents. Arterial Spin Labeling (ASL) technique permits to use water contained in the blood as an endogenous contrast agent, reducing the intrinsic invasively process required by this kind of examination.Furthermore it increases patient's comfort and reduces cost effective of perfusion measurements in clinical environment. This key feature allows to estimate perfusion in particular patients, like children or in case of allergy to the tracer. Another advantage is the poss
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Carvalho, Silas Luiz de. "Persistência de ordem em modelos ferromagnéticos na presença de campos auto-similares quase aleatórios\"." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-02042008-144148/.

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Neste trabalho estudamos a existência de ordem de longo alcance em modelos ferromagnéticos na presença de um campo externo cuja configuração apresenta um padrão tipicamente aleatório. Provamos por meio do argumento de Peierls modificado por Griffiths para o estudo de um antiferromagneto, que o modelo de Ising ferromagnético bidimensional exibe, para um campo alternado de intensidade fraca, ordem de longo alcance `a temperatura finita. Propomos dar um passo além considerando campos auto-similares esparsos, cuja soma é nula em todas as escalas. Estudamos também o modelo hierárquico em duas dimen
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Auríchio, Vinícius Henrique. "Deformações quase-integráveis do modelo de Bullough-Dodd." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-08092014-153357/.

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Esta dissertação investiga uma particular deformação do modelo de Bullough-Dodd. Não se sabe se tais deformações são ou não integráveis, ainda que nossas simulações numéricas apresentem soluções solitônicas. Exploramos o conceito de quase-integrabilidade em mais esse contexto e mostramos um argumento analítico para a quase-conservação das cargas (isto é, as cargas variam com o tempo, mas seus valores inicial e final são os mesmos). Mesmo quando o argumento analítico não pode fazer previsões, nossas simulações mostram que as cargas apresentam o mesmo comportamento. Isso sugere que as deformaçõe
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Fröhlich, Kristina, Christoph Jacobi, Martin Lange, and Alexander Pogoreltsev. "The quasi two-day wave." Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-217134.

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The quasi two-day wave (QTDW), a prominent feature of the mesosphere mainly around solstices, is simulated with the COMMA-LIM Model (Cologne Model of the Middle Atmosphere - Leipzig Institute for Meteorology). The calculations are made approximately one month after the summer solstice in the Northern Hemisphere when the QTDW reaches its maximum in the mesosphere and lower thermosphere. The results show that the QTDW produces a moderate westward forcing of the zonally averaged flow and a poleward driving of the residual mean meridional circulation<br>Die Quasi Zwei-Tage Welle (QTDW), eine deutl
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Lu, Yaohui. "Scheduling quasi-min-max model predictve control." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/11692.

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Nguyen, Thi Thanh Huyen. "Quasi optimal model checking for concurrent systems." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCD087.

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En effectuant une exploration exhaustive de tous les comportements possibles du système, le model checking fait face au problème de l’explosion de cet espace d’états. Notre but est de vérifier des programmes concurrents. Nous avons proposé de combiner la DPOR et le dépliage dans un algorithme appelé POR basée sur le dépliage. Dans cette thèse, nous prouvons que le calcul des alternatives dans une DPOR optimale est un problème NP-complet. Nous proposons une approche hybride appelée réduction d’ordre partiel quasi-optimale (QPOR). En particulier, nous proposons une nouvelle notion d’alternative k
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Rodrigues, Tulio Eduardo. "O modelo de cascata intranuclear MCMC e aplicações para o mecanismo do quase-dêuteron e a fotoprodução de pions em energias intermediárias e altas." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-27042009-114231/.

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O Presente trabalho propôs o estudo de reações fotonucleares e fotoprodução de pions em energias intermediárias e altas usando o modelo de cascata intranuclear MCMC para a fase rápida de reação e outro algoritmo de Monte Carlo para descrever o processo de decaimento do núcleo composto via evaporação de partículas e fissão nuclear. Dentre as principais inovações implementadas no MCMC, podemos citar: i) a inclusão detalhada do canal do quase-dêuteron no intervalo 20 < Eg < 140 MeV; ii) o desenvolvimento inédito e rigoroso de um mecanismo de bloqueio de Pauli não-estocástico, avaliando as excitaç
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Hatzinger, Reinhold. "A GLM framework for item response theory models. Reissue of 1994 Habilitation thesis." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 2008. http://epub.wu.ac.at/1384/1/document.pdf.

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The aim of the monograph is to contribute towards bridging the gap between methodological developments that have evolved in the social sciences, in particular in psychometric research, and methods of statistical modelling in a more general framework. The first part surveys certain special psychometric models (often referred to as Rasch family of models) that share common properties: separation of parameters describing qualities of the subject under investigation and parameters related to properties of the situation under which the response of a subject is observed. Using conditional maximum li
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Books on the topic "Model quasar"

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Neill, Desmond G. Portlaw: A nineteenth century Quaker enterprise based on a model village. Historical Committee of the Religious Society of Friends in Ireland, 1992.

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Heinbockel, J. H. Comparison of laser models. Old Dominion University Research Foundation, Dept. of Mathematics, College of Sciences, Old Dominion University, 1992.

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Heinbockel, J. H. Comparison of laser models. Old Dominion University Research Foundation, Dept. of Mathematics, College of Sciences, Old Dominion University, 1992.

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Heinbockel, J. H. Comparison of laser models. Mathematical Sciences Dept., College of Sciences, Old Dominion University, 1989.

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Bahcall, John N. PKS 2349-014: A luminous quasar with thin wisps, a large off-center nebulosity, and a close companion galaxy. National Aeronautics and Space Administration, 1995.

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Sofia, Kirhakos, Schneider Donald P, and United States. National Aeronautics and Space Administration., eds. PKS 2349-014: A luminous quasar with thin wisps, a large off-center nebulosity, and a close companion galaxy. National Aeronautics and Space Administration, 1995.

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Sofia, Kirhakos, Schneider Donald P, and United States. National Aeronautics and Space Administration., eds. PKS 2349-014: A luminous quasar with thin wisps, a large off-center nebulosity, and a close companion galaxy. National Aeronautics and Space Administration, 1995.

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Sofia, Kirhakos, Schneider Donald P, and United States. National Aeronautics and Space Administration., eds. PKS 2349-014: A luminous quasar with thin wisps, a large off-center nebulosity, and a close companion galaxy. National Aeronautics and Space Administration, 1995.

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Olsen, Norm. Software to complement HTI's model 240 split-beam echosounder: A user's guide to HAFU, hydro-acoustic file utilities, and QTS, Qualark tools for S-Plus. Dept. of Fisheries and Oceans, Pacific Biological Station, 1995.

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Butusov, Oleg, and Valeriy Meshalkin. Fundamentals of informatization and mathematical modeling of ecological systems. INFRA-M Academic Publishing LLC., 2023. http://dx.doi.org/10.12737/1477254.

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The concept, theory and methodological foundations of environmental informatics are presented, the tools of informatization and digitalization of technogenic-natural systems are described, methods of mathematical modeling of ecological systems in industrial areas are considered. The main methods of ecological informatics, methods of mathematical and computer modeling of quasi-static (long-term) dynamics of ecosystems are described. The theoretical foundations of calculating the "dose-effect" dependencies as the main indicators of the degree of impact of industrial emissions on the environment
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Book chapters on the topic "Model quasar"

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Greyber, Howard D. "The Strong Magnetic Field Galactic Center-AGN-Quasar Model." In The Center of the Galaxy. Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2362-1_43.

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Camenzind, M. "Quasar Models." In High Energy Astrophysics. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-73560-8_11.

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Blome, H. J., W. Priester, and J. Hoell. "New Ways in Cosmology: Part I: Friedmann-Lemaitre Model Derived from the Lyman Alpha Forest in Quasar Spectra." In Currents in High-Energy Astrophysics. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0253-7_22.

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Narayan, Ramesh. "Gravitational Lensing — Models." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_122.

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D’Onofrio, Mauro, Paola Marziani, Jack W. Sulentic, et al. "Models of Quasars." In Fifty Years of Quasars. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-27564-7_6.

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Blandford, R. D. "Black Hole Models of Quasars." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_87.

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Kundt, W. "Models for Extragalactic Radio Sources." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_97.

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Pérez-Fournon, I., and P. Biermann. "A Shock Model for Quasars and Active Galactic Nuclei." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_92.

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Joly, M. "Photoionization Models and Low Ionization Lines in AGN." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_78.

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Sivaram, C. "Inflationary Universe Models and Clustering Of Quasar Red Shifts." In Quasars. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4716-0_118.

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Conference papers on the topic "Model quasar"

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van Eeden, Dylan, and Marc M. Dignam. "Generation of Entangled Squeezed Light in a Multimode Coupled-Cavity Photonic Crystal." In CLEO: Applications and Technology. Optica Publishing Group, 2024. http://dx.doi.org/10.1364/cleo_at.2024.jw2a.87.

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We present a design for a photonic crystal coupled-cavity system to generate entangled two-mode squeezed states of light on-chip and model it with a basis of non-orthogonal leaky quasi-modes to account for scattering loss.
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Król, Szymon. "Discrete quasi-sliding mode control of a two rotor aerodynamic system." In 2024 28th International Conference on Methods and Models in Automation and Robotics (MMAR). IEEE, 2024. http://dx.doi.org/10.1109/mmar62187.2024.10680823.

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Nesic, Srdjan, Ying Xiao, and B. F. M. Pots. "A Quasi 2-D Localized Corrosion Model." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04628.

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Abstract In 1996 Pots has written a two-dimensional (2-D) stochastic algorithm to simulate the morphology of localized attack. The rule based algorithm operates on the assumption that the morphology of corrosion attack depends on the balance of two processes: corrosion (leading to metal loss) and precipitation (leading to metal protection). The rules of the original algorithm were modified to enable simulation of a broader variety of localized corrosion morphologies found in practice. The algorithm, which uses scaling tendency as the only input parameter, was connected with the mechanistic mod
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Reveles, Nicolas, Adam Weiss, and Parthiv Shah. "An Indirect Stability Method Applied to Whirl Flutter using Computational Fluid Dynamics Actuator Disc Models." In Vertical Flight Society 80th Annual Forum & Technology Display. The Vertical Flight Society, 2024. http://dx.doi.org/10.4050/f-0080-2024-1367.

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A recently developed indirect eigenvalue method is applied to propeller whirl flutter stability using computational fluid dynamics. The use of computationally efficient actuator disc models is compared to actuator blade and wall-resolved models. Actuator disc and blade results are confirmed to be both mesh and time-step independent. Actuator disc models produce stability results that closely emulate analytic quasi-steady approximations, whereas actuator blade models are observed to most closely resemble analytic unsteady approximations. The wall-resolved model of the propeller produces the mos
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Raikov, A., N. Lovyagin, and V. Yershov. "Superluminous quasars and mesolensing." In ASTRONOMY AT THE EPOCH OF MULTIMESSENGER STUDIES. Proceedings of the VAK-2021 conference, Aug 23–28, 2021. Crossref, 2022. http://dx.doi.org/10.51194/vak2021.2022.1.1.160.

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Observed magnitudes of many quasars with redshifts exceeding z = 5 correspond to luminosities L bol &gt; 10 14 L ⊙ . Thestandard mechanism of quasar energy release by accretion suggests that masses of superluminous quasars should exceed10 10 M ⊙ . On the other hand, the age of these objects in the standard cosmological model is below one billion years, whichis too short to explain their formation in the early Universe. Many quasars are known to be gravitationally lensed; showingmultiple images of the same object. In the case of remote quasars with no multiple images, it is still possible that
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Raju, Aman, Andjelka Kovačević, Marina Pavlović, Dragana Ilić, Iva Čvorivić-Hajdinjak, and Luka Č. Popović. "UPGRADING QNPY: MODELLING QUASAR LIGHT CURVES IN LARGE SURVEYS." In VI Conference on Active Galactic Nuclei and ravitational Lensing. Astronomical Observatory Belgrade, Volgina 7, 11060 Belgrade 38, Serbia, 2024. http://dx.doi.org/10.69646/aob24015.

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We build on the LSST-SER-SAG- S1 team’s QNPy (modeling Quasar time series with Neural processes in Python) by integrating Self- Organizing Maps (SOMs) and Attentive Latent Neural Processes to offer a computationally efficient and reliable package to model quasar variability. Harnessing the power of SOMs for clustering and Attentive Latent Neural Processes for features sampled from within the latent space, we present the pilot results of our analysis on several large surveys from the Optical and X-ray bands including the LSST AGN Data Challenge, Gaia, ZTF, and Swift Surveys.
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Petrecca, V., I. E. Papadakis, M. Paolillo, D. De Cicco, and F. E. Bauer. "ENSEMBLE POWER SPECTRAL DENSITY OF QUASARS IN UV/OPTICAL BANDS." In VI Conference on Active Galactic Nuclei and ravitational Lensing. Astronomical Observatory Belgrade, Volgina 7, 11060 Belgrade 38, Serbia, 2024. http://dx.doi.org/10.69646/aob24013.

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Variability of AGN has proven to be a powerful tool to constrain the properties of the accretion process onto supermassive black holes and their surroundings. Correlations between UV/optical variability and physical properties have been long studied with a plethora of different approaches and time-domain surveys, although the detailed interplay between different emitting regions is not yet clear. Upcoming surveys such as the Legacy Survey of Space and Time (LSST) will revolutionize time domain astronomy by increasing both the size of the sample and the temporal baseline. I present a completely
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Marziani, Paola, S. Terefe Mengistue, A. del Olmo, et al. "THE DISK PLUS (FAILED) WIND SYSTEM OF 3C 47: A STORY OF ACCRETION DISKS AND BINARY BLACK HOLES." In VI Conference on Active Galactic Nuclei and ravitational Lensing. Astronomical Observatory Belgrade, Volgina 7, 11060 Belgrade 38, Serbia, 2024. http://dx.doi.org/10.69646/aob24012.

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Optically thick, geometrically thin accretion disks (ADs) around supermassive black holes are thought to contribute to broad-line emission in type-1 active galactic nuclei (AGN). However, observed emission line profiles most often deviate from those expected from a rotating disk, and the role of ADs in contributing to broad Balmer lines and high-ionization UV lines such as CIVλ1549 in radio-loud (RL or “jetted”) AGN remains unclear. We first quantified the low-ionization broad emission line properties of jetted quasars in the main sequence context. We confirm that broad emission lines show lar
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Murakami, Shintaroh, and Hidekazu Nishimura. "Modal Analysis of a Motorcycle Motion During Braking for its Stabilization Control System Design." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-4013.

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In this paper, modal motion of a motorcycle during braking is analyzed to clarify influence of a stabilization control system designed to the modes. A thirteen degree-of-freedom nonlinear state-space model including rider’s motion is linearized around an equilibrium point of quasi-steady state straight running with constant deceleration, and the modal analysis is carried out using the linearized state-space models. Conducting mode separation and performing simulations utilizing the linearized state-space models, the behavior of the modes including capsize, weave, and wobble modes are analyzed.
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Agol, Eric, Ivan Hubeny, and Omer Blaes. "Continuum spectra of quasar accretion disk models." In Accretion processes in astrophysical systems: Some like it hot! - eigth astrophysics conference. AIP, 1998. http://dx.doi.org/10.1063/1.55893.

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Reports on the topic "Model quasar"

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Goedecke, George H., D. K. Wilson, Vladimir E. Ostashev, and Harry J. Auvermann. Quasi-Wavelet Models for Atmospheric Turbulence. Defense Technical Information Center, 2002. http://dx.doi.org/10.21236/ada413962.

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Friedman, A. Solving the quasi-static field model of the pulse-line accelerator; relationship to a circuit model. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/893987.

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Covey, Curt, Richard Lindzen, John Fasullo, and Karl Taylor. Quasi-stationary Planetary Scale Waves in Modern Climate Models. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1716593.

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Cheung, C. C., L. Stawarz, and A. Siemiginowska. Confronting X-Ray Emission Models with theHighest-Redshift Kiloparsec-Scale Jets: The z = 3.89 Jet in Quasar 1745+624. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/885290.

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Knuteson, Bruce Owen. A Quasi Model Independent Search for New High $p_T$ Physics at D0. Office of Scientific and Technical Information (OSTI), 2000. http://dx.doi.org/10.2172/1421451.

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Thornhill, W., Jr Giuliani, Davis J. L., and J. The Dense Z-Pinch as a Plasma Radiation Source. 1. Quasi-Static Bennett Model. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada210600.

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Bresson, Georges, Jean-Michel Etienne, and Guy Lacroix. Nighttime light pollution and economic activities: A spatio-temporal model with common factors for US counties. CIRANO, 2023. http://dx.doi.org/10.54932/soea8799.

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Excessive nighttime light is known to have detrimental effects on health and on the environment (fauna and flora). The paper investigates the link between nighttime light pollution and economic growth, air pollution, and urban density. We propose a county model of consumption which accounts for spatial interactions. The model naturally leads to a dynamic general nesting spatial model with unknown common factors. The model is estimated with data for 3071 continental US counties from 2012–2019 using a quasi-maximum likelihood estimator. Short run and long run county marginal effects emphasize th
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Bresson, Georges, Jean-Michel Etienne, and Guy Lacroix. Nighttime light pollution and economic activities: A spatio-temporal model with common factors for US counties. CIRANO, 2023. http://dx.doi.org/10.54932/wakk9634.

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Excessive nighttime light is known to have detrimental effects on health and on the environment (fauna and flora). The paper investigates the link between nighttime light pollution and economic growth, air pollution, and urban density. We propose a county model of consumption which accounts for spatial interactions. The model naturally leads to a dynamic general nesting spatial model with unknown common factors. The model is estimated with data for 3071 continental US counties from 2012–2019 using a quasi-maximum likelihood estimator. Short run and long run county marginal effects emphasize th
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S.R. Hudson, C.C. Hegna, R. Torasso, and A. Ware. Marginal Stability Diagrams for Infinite-n Ballooning Modes in Quasi-symmetric Stellarators. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/820215.

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Smith, Richard J., and Paulo Parente. Quasi-maximum likelihood and the kernel block bootstrap for nonlinear dynamic models. The IFS, 2019. http://dx.doi.org/10.1920/wp.cem.2019.6019.

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