Results 21 to 30 of about 2,186 (186)
Is There a Missing Galaxy Problem at High Redshift? [PDF]
The Astrophysical Journal, 2004 We study the evolution of the global stellar mass density in a Lambda cold dark matter universe using two different types of hydrodynamical simulations (Eulerian TVD and SPH) and the analytical model of Hernquist & Springel (2003). We find that the theoretical calculations all predict both a higher stellar mass density at z~3 than indicated by ...
Nagamine, Kentaro +4 more
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High-Redshift Radio Galaxies [PDF]
Highlights of Astronomy, 1995 Radio galaxies are unique cosmological probes. As with radio-loud quasars, the presence of luminous radio continuum and optical line emission enable radio galaxies to be observed and recognized at large distances, up to z = 4.2. However, unlike the situation for most quasars, their optical emission can be spatially resolved from the ground and studied ...
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On the Number of Galaxies at High Redshift [PDF]
Galaxies, 2015 The number of galaxies at a given flux as a function of the redshift, z, is derived when the z-distance relation is non-standard. In order to compare different models, the same formalism is also applied to the standard cosmology. The observed luminosity function for galaxies of the zCOSMOS catalog at different redshifts is modeled by a new luminosity ...
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The circumgalactic medium of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2014 Abstract We study the properties of the circumgalactic medium (CGM) of high-z galaxies in the metal enrichment simulations presented in Pallottini et al. At z = 4, we find that the simulated CGM gas density profiles are self-similar, once scaled with the virial radius of the parent dark matter halo.
PALLOTTINI, ANDREA +2 more
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High-redshift galaxy populations and their descendants [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 16 pages, 17 figures, submitted to ...
Guo, Q., White, S.
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Cool Gas in High-Redshift Galaxies [PDF]
Annual Review of Astronomy and Astrophysics, 2013 Over the past decade, observations of the cool interstellar medium (ISM) in distant galaxies via molecular and atomic fine structure line (FSL) emission have gone from a curious look into a few extreme, rare objects to a mainstream tool for studying galaxy formation out to the highest redshifts. Molecular gas has been observed in close to 200 galaxies
Carilli, Chris, Walter, Fabian
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Morphological Classification of High Redshift Galaxies [PDF]
Astrophysics and Space Science, 2001 4 pages, 3 encapsulated figures. Proceedings of the Euroconference "The Evolution of Galaxies.I- Observational clues." held in Granada (Spain), 23-27 May, 2000.
Pignatelli, E., Fasano, G.
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The Astrophysical Journal Supplement Series, 2023 JWST has revolutionized the field of extragalactic astronomy with its sensitive and high-resolution infrared view of the distant Universe. Adding to the new legacy of JWST observations, we present the first NIRCam imaging data release from the JWST ...
Marcia J. Rieke +58 more
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Galaxies at High Redshift [PDF]
Astrophysics and Space Science, 1999 Within just the last few years, we have advanced from knowing only a few galaxies at z>2 to having redshifts for nearly 1000 z~2-5 objects. The majority of this sample has been detected through the photometric ``drop-out'' technique used so successfully by Steidel and his collaborators. In addition, a handful of objects have already been detected at
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Early Results From GLASS-JWST. XII. The Morphology of Galaxies at the Epoch of Reionization
The Astrophysical Journal Letters, 2023 Star-forming galaxies can exhibit strong morphological differences between the rest-frame far-UV and optical, reflecting inhomogeneities in star formation and dust attenuation.
T. Treu +25 more
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