Results 31 to 40 of about 210,144 (261)
The physics of Lyman α escape from high-redshift galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Lyman-alpha (Ly{\alpha}) photons from ionizing sources and cooling radiation undergo a complex resonant scattering process that generates unique spectral signatures in high-redshift galaxies. We present a detailed Ly{\alpha} radiative transfer study of a
Aaron Smith +6 more
semanticscholar +1 more source
Spectral Templates Optimal for Selecting Galaxies at z > 8 with the JWST
The Astrophysical Journal, 2023 The selection of high-redshift galaxies often involves spectral energy distribution (SED) fitting to photometric data, an expectation for contamination levels, and measurement of sample completeness—all vetted through comparison to spectroscopic redshift
Rebecca L. Larson +11 more
doaj +1 more source
The IRX–β relation of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT The relation between infrared excess (IRX) and UV spectral slope (βUV) is an empirical probe of dust properties of galaxies. The shape, scatter, and redshift evolution of this relation are not well understood, however, leading to uncertainties in estimating the dust content and star formation rates (SFRs) of galaxies at high ...
Liang, Lichen +7 more
openaire +4 more sources
Fluctuating feedback-regulated escape fraction of ionizing radiation in low-mass, high-redshift galaxies [PDF]
, 2017 Low mass galaxies are thought to provide the bulk of the ionizing radiation necessary to reionize the Universe. The amount of photons escaping the galaxies is poorly constrained theoretically, and difficult to measure observationally.
M. Trebitsch +4 more
semanticscholar +1 more source
Galaxies at High Redshift and Reionization
Il Nuovo Cimento B, 2008 ASP Conference Series, Vol. 395 (50 years of NRAO, eds A. Bridle, J. Condon & G. Hunt)
Bunker, A. +7 more
openaire +3 more sources
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
openaire +4 more sources
The K20 survey. IV. The redshift distribution of Ks<20 galaxies: a test of galaxy formation models [PDF]
, 2002 We present the redshift distribution of a complete sample of 480 galaxies with Ks1 and z>1.5 respectively. A ``blind'' comparison is made with the predictions of a set of the most recent LambdaCDM hierarchical merging and pure luminosity evolution (PLE ...
Arimoto +27 more
core +2 more sources
Nearly all the sky is covered by Lyman-α emission around high-redshift galaxies [PDF]
Nature, 2018 Galaxies are surrounded by large reservoirs of gas, mostly hydrogen, that are fed by inflows from the intergalactic medium and by outflows from galactic winds.
L. Wisotzki +26 more
semanticscholar +1 more source
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 ...
openaire +1 more source
The Extinction Law in High‐Redshift Galaxies [PDF]
The Astrophysical Journal, 2004 We estimate the dust extinction laws in two intermediate redshift galaxies. The dust in the lens galaxy of LBQS1009-0252, which has an estimated lens redshift of zl~0.88, appears to be similar to that of the SMC with no significant feature at 2175 A.
Munoz, J. A. +4 more
openaire +2 more sources