Results 21 to 30 of about 5,054,977 (388)
JWST Reveals a Population of Ultrared, Flattened Galaxies at 2 ≲ z ≲ 6 Previously Missed by HST
The Astrophysical Journal Letters, 2023 With just a month of data, JWST is already transforming our view of the universe, revealing and resolving starlight in unprecedented populations of galaxies.
Erica J. Nelson +25 more
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Galaxies, 2021 Not all the light in galaxy groups and clusters comes from stars that are bound to galaxies. A significant fraction of it constitutes the so-called intracluster or diffuse light (ICL), a low surface brightness component of groups/clusters generally found
Emanuele Contini
doaj +1 more source
Rapid Quenching of Galaxies at Cosmic Noon
The Astrophysical Journal, 2023 The existence of massive quiescent galaxies at high redshift seems to require rapid quenching, but it is unclear whether all quiescent galaxies have gone through this phase and what physical mechanisms are involved.
Minjung Park +8 more
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The role of submillimetre galaxies in hierarchical galaxy formation [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 We study the role of submillimetre galaxies (SMGs) in the galaxy formation process in the Lambda Cold Dark Matter cosmology. We use the Baugh et al. (2005) semi-analytical model, which matches the observed SMG number counts and redshift distribution by assuming a top-heavy initial mass function (IMF) in bursts triggered by galaxy mergers.
González, J.E. +3 more
openaire +3 more sources
Chaos and variance in galaxy formation [PDF]
Monthly notices of the Royal Astronomical Society, 2018 The evolution of galaxies is governed by equations with chaotic solutions: gravity and compressible hydrodynamics. While this micro-scale chaos and stochasticity has been well studied, it is poorly understood how it couples to macro-scale properties ...
B. Keller +3 more
semanticscholar +1 more source
Symposium - International Astronomical Union, 1987 Theories of galaxy formation via hierarchical clustering of cold dark matter and by fragmentation of gaseous pancakes or shells are reviewed and compared. Dissipative processes are crucial to all theories of galaxy formation, and are discussed in terms of a simple model involving multiple cloud interactions.
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The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations [PDF]
, 2015 We present results from thirteen cosmological simulations that explore the parameter space of the "Evolution and Assembly of GaLaxies and their Environments" (EAGLE) simulation project.
R. Crain +13 more
semanticscholar +1 more source
How to Measure Galaxy Star Formation Histories. II. Nonparametric Models [PDF]
Astrophysical Journal, 2018 Nonparametric star formation histories (SFHs) have long promised to be the “gold standard” for galaxy spectral energy distribution (SED) modeling as they are flexible enough to describe the full diversity of SFH shapes, whereas parametric models rule out
J. Leja +4 more
semanticscholar +1 more source
Stress testing ΛCDM with high-redshift galaxy candidates [PDF]
Nature Astronomy, 2022 Early James Webb Space Telescope (JWST) results suggest a high level of star formation in the first 500 million years of the Universe. A study of the available mass from dark matter haloes shows that unexpectedly high-mass JWST galaxy candidates may ...
M. Boylan-Kolchin
semanticscholar +1 more source
The Astrophysical Journal, 2023 A key question in galaxy evolution has been the importance of the apparent “clumpiness” of high-redshift galaxies. Until now, this property has been primarily investigated in rest-frame UV, limiting our understanding of their relevance.
Boris S. Kalita +6 more
doaj +1 more source