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Artykuły w czasopismach na temat „Galaxies primitives”

Autor: Grafiati
Data publikacji: 21 września 2024
Data aktualizacji: 31 lipca 2025

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Sprawdź 25 najlepszych artykułów w czasopismach naukowych na temat „Galaxies primitives”.

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1

Heap, Sara R., I. Hubeny, J. C. Bouret, T. Lanz, and J. Brinchmann. "Properties of Primitive Galaxies." Proceedings of the International Astronomical Union 18, S361 (2022): 485–89. http://dx.doi.org/10.1017/s1743921322003246.

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AbstractWe report on a study of 9 nearby primitive galaxies observed by Hubble’s COS far-UV spectrograph that can serve as templates of high-z galaxies to be observed by JWST. By “primitive galaxies,” we mean galaxies having a low stellar mass, and low gas metallicity, , whether they are local or at high redshift. We find that far-UV spectra of these galaxies show evidence of hard radiation, including X-rays. Following Thuan et al. (2004), we identify these galaxies as massive X-ray binaries containing a massive accreting stellar black hole. We further find that the lower the metallicity, the
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Thomsen, D. E. "Galaxies in a Primitive State?" Science News 133, no. 4 (1988): 52. http://dx.doi.org/10.2307/3972612.

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Finkelstein, Steven L., James E. Rhoads, Sangeeta Malhotra, and Norman Grogin. "LYMAN ALPHA GALAXIES: PRIMITIVE, DUSTY, OR EVOLVED?" Astrophysical Journal 691, no. 1 (2009): 465–81. http://dx.doi.org/10.1088/0004-637x/691/1/465.

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Heap, Sara R. "What can the UV SED tell us about primitive galaxies?" Proceedings of the International Astronomical Union 7, S284 (2011): 49–52. http://dx.doi.org/10.1017/s174392131200871x.

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Fraix-Burnet, Didier, Mauro D’Onofrio, and Paola Marziani. "Maximum parsimony analysis of the effect of the environment on the evolution of galaxies." Astronomy & Astrophysics 630 (September 23, 2019): A63. http://dx.doi.org/10.1051/0004-6361/201935604.

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Context. Galaxy evolution and the effect of the environment are most often studied using scaling relations or regression analyses around a given property. However, these approaches do not take into account the complexity of the physics of the galaxies and their diversity. Aims. We here investigate the effect of the cluster environment on the evolution of galaxies through multivariate, unsupervised classification and phylogenetic analyses applied to two relatively large samples from the Wide-field Nearby Galaxy-cluster Survey (WINGS), one of cluster members and one of field galaxies (2624 and 1
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Chen, Ke-Jung, Ching-Yao Tang, Daniel J. Whalen, et al. "How Population III Supernovae Determined the Properties of the First Galaxies." Astrophysical Journal 964, no. 1 (2024): 91. http://dx.doi.org/10.3847/1538-4357/ad2684.

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Abstract Massive Population III stars can die as energetic supernovae that enrich the early Universe with metals and determine the properties of the first galaxies. With masses of about 109 M ⊙ at z ≳ 10, these galaxies are believed to be the ancestors of the Milky Way. This paper investigates the impact of Population III supernova remnants (SNRs) from both Salpeter-like and top-heavy initial mass functions (IMFs) on the formation of first galaxies with high-resolution radiation-hydrodynamical simulations with the ENZO code. Our findings indicate that SNRs from a top-heavy Population III IMF p
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Heap, Sara. "Role of massive stars in the evolution of primitive galaxies." Proceedings of the International Astronomical Union 10, H16 (2012): 370. http://dx.doi.org/10.1017/s1743921314011429.

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AbstractAn important factor controlling galaxy evolution is feedback from massive stars. It is believed that the nature and intensity of stellar feedback changes as a function of galaxy mass and metallicity. At low mass and metallicity, feedback from massive stars is mainly in the form of photoionizing radiation. At higher mass and metallicity, it is in stellar winds. I Zw 18 is a local blue, compact dwarf galaxy that meets the requirements for a primitive galaxy: low halo mass <109M⊙, strong photoionizing radiation, no galactic outflow, and very low metallicity, log(O/H)+12=7.2. We will de
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Guimaraes, Eduardo S. "The Lunar Problem is The Barrier of The Future Time of The Earth." JOURNAL OF ADVANCES IN PHYSICS 14, no. 3 (2018): 5873–916. http://dx.doi.org/10.24297/jap.v14i3.7802.

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This article "The lunar problem is the barrier of the future time of the Earth" is a logical and rational analysis of the formation of the nuclear universe with galaxies, stars, the Sun star, the system of planets and the moons, and arrives at new original and inedited conclusions.
 
 The Big Bang of the primitive universe is a sequence programmed by the nature of thermonuclear super explosions in sidereal space.
 These thermonuclear super explosions swept nuclear sidereal space generating the large mass islands of galaxies like the Milky Way.
 The Milky Way was the first g
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9

Pattery, George. "Building New Humanity through Faith:Republic Day Message 2019." AUC: Asian Journal of Religious Studies Mar-June 2019, no. 64/2-3 (2019): 63–67. https://doi.org/10.5281/zenodo.4274728.

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If I recall rightly, in 1974 or so, on Gandhi Jayanthi day, late Fr. Samuel Rayan in his homily in this very chapel said: Bapuji (Gandhi) and Ambedkar are symbols of new humanity. On hindsight today we could also say, Fr. Sam was one of them, showing traits of a new humanity. Describing the evolutionary progression, Scientist Philip Clayton wrote: “Once there was no universe and then, after the Big Bang, there was an exploding world of stars and galaxies. Once the earth was unpopulated and later it was teeming with primitive life forms. Once there were apes living in trees and then there
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10

Bolatto, Alberto D., Adam K. Leroy, Erik Rosolowsky, Fabian Walter, and Leo Blitz. "The Resolved Properties of Extragalactic Giant Molecular Clouds." Proceedings of the International Astronomical Union 4, S255 (2008): 274–77. http://dx.doi.org/10.1017/s1743921308024939.

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AbstractGiant molecular clouds (GMCs) are the major reservoirs of molecular gas in galaxies, and the starting point for star formation. As such, their properties play a key role in setting the initial conditions for the formation of stars. We present a comprehensive combined inteferometric/single-dish study of the resolved GMC properties in a number of extragalactic systems, including both normal and dwarf galaxies. We find that the extragalactic GMC properties measured across a wide range of environments, characterized by the Larson relations, are to first order remarkably compatible with tho
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11

Papagiannis, M. D., F. D. Drake, N. S. Kardashev, et al. "Commission 51: Search for Extraterrestrial Life." Transactions of the International Astronomical Union 19, no. 1 (1985): 713–23. http://dx.doi.org/10.1017/s0251107x00006817.

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The possibility that life, primitive or advanced, might exist in other places of the Universe has occupied the minds of scientists and lay-people for thousands of years. It is only in the last 25 years, however, that we have finally begun to search for answers to this profound question using experimental techniques. The goal of Astronomy is to understand the origin and evolution of planets, stars, galaxies and of the Universe as a whole. The appearance of life is an integral part of this whole process and our picture of the Universe will never be complete until we will comprehend also the sign
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12

Aguerri, J. A. L., A. Longobardi, S. Zarattini, A. Kundert, E. D’Onghia, and L. Domínguez-Palmero. "Fossil group origins." Astronomy & Astrophysics 609 (January 2018): A48. http://dx.doi.org/10.1051/0004-6361/201731711.

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Context. It is thought that fossil systems are relics of structure formation in the primitive Universe. They are galaxy aggregations that have assembled their mass at high redshift with few or no subsequent accretion. Observationally these systems are selected by large magnitude gaps between their 1st and 2nd ranked galaxies (Δm12). Nevertheless, there is still debate over whether or not this observational criterium selects dynamically evolved ancient systems. Aims. We have studied the properties of the nearby fossil group RX J075243.6+455653 in order to understand the mass assembly of this sy
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13

Whalen, Daniel J. "Detecting the First Supernovae in the Universe with JWST." Proceedings of the International Astronomical Union 7, S279 (2011): 269–73. http://dx.doi.org/10.1017/s1743921312013038.

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AbstractMassive Population III stars die as pair-instability supernovae (PI SNe), the most energetic thermonuclear explosions in the universe with energies up to 100 times those of Type Ia or Type II SNe. Their extreme luminosities may allow them to be observed from the earliest epochs, revealing the nature of Pop III stars and the primitive galaxies in which they reside. We present numerical simulations of Pop III PI SNe done with the radiation hydrodynamics code RAGE and calculations of their light curves and spectra performed with the SPECTRUM code. We find that 150 - 250 M⊙ PI SNe will be
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14

Llorente de Andrés, Félix. "Some Old Globular Clusters (and Stars) Inferring That the Universe Is Older Than Commonly Accepted." American Journal of Astronomy and Astrophysics 11, no. 1 (2024): 1–13. http://dx.doi.org/10.11648/j.ajaa.20241101.11.

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The James Webb Space Telescope (JWST) has made startling discoveries regarding the early universe. It has revealed galaxies as soon as 300 million years after the Big Bang, challenging current galaxy formation models. Additionally, it has identified massive, bright galaxies in the young universe, contradicting the standard ΛCDM model's age estimate of 13.8 Gyr. This prompts a re-evaluation of galaxy formation and cosmological models. There is a strong tension between JWST high-redshift galaxy observations and Planck Cosmic Microwave Background (CMB) satellite measurements. Even altern
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15

Lebouteiller, V., D. Péquignot, D. Cormier, et al. "Neutral gas heating by X-rays in primitive galaxies: Infrared observations of the blue compact dwarf I Zw 18 withHerschel." Astronomy & Astrophysics 602 (June 2017): A45. http://dx.doi.org/10.1051/0004-6361/201629675.

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Abdulkareem, Mustafa Abdulsahib, and Ahmed Sahib Mubarak. "The Sequential Schematic Scene-building Theory in Dan Brown’s The Da Vinci Code: A Cognitive Semantic Study." World Journal of English Language 13, no. 1 (2022): 234. http://dx.doi.org/10.5430/wjel.v13n1p234.

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Everything in the universe is movable or being moved, starting from galaxies and planets to the smallest object, such as the atom. But how can we conceptualize the motion of such entities and what are the basic elements of sequential scene? To do that, a theory of the sequential schematic scene-building has developed to treat this issue. This theory deals with the basic dynamic, on-line, or real-time perceptual processes by which we build a scene. The study focuses on the schematic, not conceptual, elements of sequential scenes which deal with the highly abstracted, primitive system. Such syst
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17

Sagitova, Liliya V. "Ethnicity and tradition in changing communication contexts: a view through the “Galaxies” of Gutenberg, Makljuen and Zuckerberg." Historical Ethnology 7, no. 3 (2022): 443–56. http://dx.doi.org/10.22378/he.2022-7-3.443-456.

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The article analyzes the phenomena of ethnicity and tradition in the context of the development of society from the traditional type to the globalised one. In the conducted analysis of various approaches to their interpretation, the vulnerable positions of such trends as primordialism, constructivism, and instrumentalism are considered. As an alternative, helping to eliminate controversial points, an attempt is made to use the theories of M.G. Мakljuen and M. Castells. Application of the paradigm of informationalism provides an opportunity to use the optics of communication to analyse the tran
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18

Maillard, Jean-Pierre. "Is the Moon the future of infrared astronomy?" Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2188 (2020): 20200212. http://dx.doi.org/10.1098/rsta.2020.0212.

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Infrared astronomy, particularly in spectroscopy, could benefit in a decisive way from an implementation of telescopes on the Moon since the largest telescopes on Earth are practically limited to 40 m and in space to 10 m. On the Moon, a collector larger than on Earth becomes conceivable, thanks to the low gravity and the absence of wind, in having the advantages of space. Passively cooled in the bottom of a permanently shadowed crater at the northern or the southern pole, it could reach unprecedented spectral sensitivity on a large part of the infrared domain, making possible spectral analysi
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19

Norris, John E. "Very Metal-Poor Stars and the Early Universe." Proceedings of the International Astronomical Union 13, S334 (2017): 3–10. http://dx.doi.org/10.1017/s1743921317008900.

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AbstractVery metal-poor stars ([Fe/H] < –2.0) inform our understanding of the formation and evolution of the Galaxy, and the physical conditions in the earliest star-forming environments of the Universe. They play an integral part in the paradigms of stellar populations, stellar archaeology, and near-field cosmology. We review the carbon-rich and carbon-normal sub-populations of the most iron-poor stars, providing insight into chemical enrichment at the earliest times in the Universe. We also discuss the role of very metal-poor stars in providing insight into the Galaxy’s halo, thick di
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Нарожний, А. М. "ФОТОН". Open Information and Computer Integrated Technologies, № 102 (10 лютого 2025): 160–65. https://doi.org/10.32620/oikit.2024.102.10.

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A photon is considered as a particle of electromagnetic radiation of stars. An attempt is made to primitively represent the process of organizing a “particle-antiparticle” pair of two photons on opposite courses. In this case, the simplest geometric images and the same physical interpretations of the resulting visual “constructions” are used. A simple procedure for organizing the electric and magnetic fields in the resulting “particle” leads to the presence of a non-electromagnetic component in the photon. At the same time, the energy of such a component of the photon makes up the largest part
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21

SANTILLI, RUGGERO MARIA. "A CLASSICAL ISODUAL THEORY OF ANTIMATTER AND ITS PREDICTION OF ANTIGRAVITY." International Journal of Modern Physics A 14, no. 14 (1999): 2205–38. http://dx.doi.org/10.1142/s0217751x99001111.

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An inspection of the contemporary physics literature reveals that, while matter is treated at all levels of study, from Newtonian mechanics to quantum field theory, antimatter is solely treated at the level of second quantization. For the purpose of initiating the restoration of full equivalence in the treatment of matter and antimatter in due time, and as the classical foundations of an axiomatically consistent inclusion of gravitation in unified gauge theories recently appeared elsewhere, in this paper we present a classical representation of antimatter which begins at the primitive Newtonia
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22

Cases Martínez, Víctor. "De los filosofastros al philosophe. La melancolía del sabio y el sacerdocio del hombre de letras." Vínculos de Historia. Revista del Departamento de Historia de la Universidad de Castilla-La Mancha, no. 8 (June 20, 2019): 277. http://dx.doi.org/10.18239/vdh_2019.08.14.

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RESUMENEste artículo propone un recorrido a través de la figura del pensador de la Baja Edad Media a la Ilustración. Publicada en 1621, la Anatomía de la melancolía de Robert Burton dibuja la imagen del filósofo nuevo, opuesto a los desvergonzados filosofastros que daban título a la comedia de 1615. Demócrito Júnior supone la confirmación de la nueva figura intelectual que ha dejado atrás al clerc de la Baja Edad Media: el humanista del Renacimiento que, gracias a la rehabilitación llevadaa cabo por Marsilio Ficino del mal de la bilis negra, confiesa con orgullo su carácter melancólico, propio
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Croswell, Ken. "Nearby primitive galaxies offer a window into the early universe." Proceedings of the National Academy of Sciences 119, no. 18 (2022). http://dx.doi.org/10.1073/pnas.2204371119.

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Heckler, Kelly F., Rogemar A. Riffel, and Tiago V. Ricci. "Spatially resolved spectroscopic observations of gas emission in dwarf galaxies hosting accreting black hole candidate." Monthly Notices of the Royal Astronomical Society, May 23, 2024. http://dx.doi.org/10.1093/mnras/stae1297.

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Abstract Recent studies on dwarf galaxies reveal that some of them harbor a massive black hole (BH), which is believed to have a similar mass of the Supermassive BH ‘seeds’ at early times. The origin and growth of the primitive BHs are still open questions, since these BH seeds are hardly observed at high redshifts. Therefore, massive BH of dwarf galaxies can be the perfect candidates to untangle BH ‘seeds’ properties and their influence on their host galaxy evolution, since massive BH may preserve their initial conditions due to its quiet merger and accretion histories. We use optical integra
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Cheng, Ting-Yun, and Ryan J. Cooke. "Efficient Search for Extremely Metal Poor Galaxies in the Local Universe using Convolutional Neural Networks." Monthly Notices of the Royal Astronomical Society, April 28, 2025. https://doi.org/10.1093/mnras/staf690.

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Abstract Nearby extremely metal-poor galaxies (XMPs) allow us to study primitive galaxy formation and evolution in greater detail than is possible at high redshift. This work promotes the use of convolutional neural networks (CNNs) to efficiently search for XMPs in multi-band imaging data based on their predicted N2 index (N2 ≡ log {$[\mathrm{N}\, {\small {II}}]\, \lambda 6585$/Hα}). We developed a sequential characterisation pipeline, composed of three CNN procedures: (i) a classifier for metal-poor galaxies, (ii) a classifier for XMPs, and (iii) an N2 predictor. The pipeline is applied to ov
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