Results 1 to 10 of about 473 (99)
Galaxy formation at high redshifts [PDF]
Nature, 1996 Sensitive optical surveys have revealed a large population of `faint blue galaxies' which are believed to be young galaxies, observed close to their time of formation. But there has been considerable uncertainty regarding the epochs at which these galaxies are observed, owing to the difficulties inherent in determining spectroscopic redshifts for very ...
Richard Fong +5 more
openaire +4 more sources
Simulating high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 14 pages, 10 figures, MNRAS in ...
Salvaterra, Ruben +2 more
openaire +4 more sources
Dust in High‐Redshift Galaxies [PDF]
The Astrophysical Journal, 1997 Measurements of Zn and Cr abundances in damped Lyman alpha systems at absorption redshifts between 0.692 and 3.390 show that metals and dust are much less abundant in high redshift galaxies than in the Milky Way today. We conclude that the overall degree of metal enrichment of DLA galaxies approximately 13.5 Gyr ago is 1/15 solar.
Richard W. Hunstead +3 more
openaire +3 more sources
High Redshift Radio Galaxies [PDF]
Symposium - International Astronomical Union, 1996 One hundred years after G. Marconi recorded radio waves over a distance of more than 1000 m, the most sensitive radio telescopes are able to detect the radio emission from light travel distances at least 1.4 × 1023 times greater. The electromagnetic waves from these distant objects are red shifted by Δλ/λ = z > 4. It is not the mere distance of high
Mark J. Neeser +2 more
openaire +5 more sources
The nature of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 Using semi-analytic models of galaxy formation set within the Cold Dark Matter (CDM) merging hierarchy, we investigate several scenarios for the nature of the high-redshift ($z \ga 2$) Lyman-break galaxies (LBGs). We consider a ``collisional starburst'' model in which bursts of star formation are triggered by galaxy-galaxy mergers, and find that a ...
Joel R. Primack +3 more
openaire +8 more sources
Finding High-redshift Galaxies with JWST [PDF]
The Astrophysical Journal, 2021 Abstract One of the primary goals for the upcoming James Webb Space Telescope is to observe the first galaxies. Predictions for planned and proposed surveys have typically focused on average galaxy counts, assuming a random distribution of galaxies across the observed field.
Charles L. Steinhardt +2 more
openaire +4 more sources
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 ...
openaire +5 more sources
On the dust temperatures of high-redshift galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 Abstract Dust temperature is an important property of the interstellar medium (ISM) of galaxies. It is required when converting (sub)millimetre broad-band flux to total infrared luminosity (LIR), and hence star formation rate, in high-redshift galaxies. However, different definitions of dust temperatures have been used in the literature,
Eliot Quataert +11 more
openaire +6 more sources
ZEN and the search for high-redshift galaxies [PDF]
New Astronomy Reviews, 2006 To appear in proceedings of UC Irvine May 2005 workshop on "First Light & Reionization", eds. E. Barton & A.
Willis, J. P. +3 more
openaire +4 more sources
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 +3 more sources