Results 131 to 140 of about 355,593 (244)
Probing Chemical Enrichment in Extremely Metal-poor Galaxies
The Astrophysical JournalThe chemical composition of galaxies offers vital insights into their formation and evolution. In particular, the relationship between helium abundance (He/H) and metallicity serves as a key diagnostic for estimating the primordial helium yield from Big ...
Keita Fukushima +6 more
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, 2009 The formation of the first galaxies at redshifts z~10-15 signaled the transition from the simple initial state of the universe to one of ever increasing complexity.
Bromm, Volker +2 more
core +1 more source
Non-Gaussianity from Large-Scale Structure Surveys
Advances in Astronomy, 2010 With the advent of galaxy surveys which provide large samples of galaxies or galaxy clusters over a volume comparable to the horizon size (SDSS-III, HETDEX, Euclid, JDEM, LSST, Pan-STARRS, CIP, etc.) or mass-selected large cluster samples over a large ...
Licia Verde
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METALS IN THE ICM: WITNESSES OF CLUSTER FORMATION AND EVOLUTION
Acta Polytechnica, 2013 The baryonic composition of galaxy clusters and groups is dominated by a hot, X-ray emitting Intra-Cluster Medium (ICM). The mean metallicity of the ICM has been found to be roughly 0.3 ÷ 0.5 times the solar value, therefore a large fraction of this gas ...
Lorenzo Lovisari +4 more
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The formation of the first galaxies and the transition to low-mass star formation
, 2009 The formation of the first galaxies at redshifts z ~ 10-15 signaled the transition from the simple initial state of the universe to one of ever increasing complexity.
A. Stacy +10 more
core +1 more source
Massive Black Hole Seed Formation in Strong X-Ray Environments at High Redshift
The Astrophysical JournalDirect collapse of pristine gas in early galaxies is a promising pathway for forming supermassive black holes (SMBHs) powering active galactic nuclei at the Epoch of Reionization (EoR). This seeding mechanism requires suppression of molecular hydrogen (H
Kazutaka Kimura +2 more
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Revealing the Origins of Galactic Globular Clusters via their Mg–Al Abundances
The Astrophysical Journal LettersMany Galactic globular clusters (GCs) originated in diverse host galaxies before being subsequently incorporated into the Milky Way through hierarchical galaxy assembly. Identifying their origins is crucial for revealing galaxy properties at early times.
Shihui Lin +6 more
doaj +1 more source
SIMULATION OF LARGE-SCALE STRUCTURE OF UNIVERSE BY GAUSSIAN RANDOM FIELDS
Odessa Astronomical Publications, 2018 Large-scale structure of Universe includes galaxy clusters connected by filaments. Voids occupy the rest of cosmic volume.The search of any dependencities in filament structure can give answer to more general questions about origin of structures in the ...
V. V. Voitsekhovskiy, A. V. Tugay
doaj +1 more source
Space fantasy: Nagaoka Shusei's contributions to Afrofuturist visual culture
The Journal of American Culture, Volume 48, Issue 1, Page 3-22, March 2025.
Nathan Hesselink
wiley +1 more source
The Velocity Dispersion Function for Quiescent Galaxies in Massive Clusters from IllustrisTNG
The Astrophysical JournalWe derive the central stellar velocity dispersion function (VDF) for quiescent galaxies in 280 massive clusters with $\mathrm{log}({M}_{200}/{M}_{\odot })\gt 14$ in IllustrisTNG300. The VDF is an independent tracer of the dark matter mass distribution of
Jubee Sohn +3 more
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