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
Galaxy Gas Fractions at High-Redshift: The Tension between Observations and Cosmological Simulations [PDF]
, 2012 CO measurements of z~1-4 galaxies have found that their baryonic gas fractions are significantly higher than galaxies at z=0, with values ranging from 20-80 %. Here, we suggest that the gas fractions inferred from observations of star-forming galaxies at high-z are overestimated, owing to the adoption of locally-calibrated CO-H2 conversion factors (Xco)
arxiv +1 more source
Morphological Evolution and the Ages of Early-Type Galaxies in Clusters [PDF]
, 2001 Morphological and spectroscopic studies of high redshift clusters indicate that a significant fraction of present-day early-type galaxies was transformed from star forming galaxies at ...
Andreon S. +16 more
core +3 more sources
The Astrophysical Journal, 2023 We use the large spectroscopic data set of the MOSFIRE Deep Evolution Field survey to investigate some of the key factors responsible for the elevated ionization parameters ( U ) inferred for high-redshift galaxies, focusing in particular on the role of ...
Naveen A. Reddy +8 more
doaj +1 more source
The influence of Hickson-like compact group environment on galaxy luminosities [PDF]
, 2022 Compact groups of galaxies are devised as extreme environments where interactions may drive galaxy evolution. In this work, we analysed whether the luminosities of galaxies inhabiting compact groups differ from those of galaxies in loose galaxy groups.
arxiv +1 more source
, 2000 There is considerable evidence that powerful radio quasars and radio galaxies are orientation-dependent manifestations of the same parent population: massive spheroids containing correspondingly massive black holes.
Fosbury, R. A. E.
core +1 more source
The build-up of the colour-magnitude relation in galaxy clusters since z~0.8 [PDF]
, 2006 Using galaxy clusters from the ESO Distant Cluster Survey, we study how the distribution of galaxies along the colour-magnitude relation has evolved since z~0.8.
Aragon-Salamanca, Alfonso +13 more
core +3 more sources
Morphological evolution in situ: Disk-dominated cluster red sequences at z ~ 1.25
, 2015 We have carried out a joint photometric and structural analysis of red sequence galaxies in four clusters at a mean redshift of z ~ 1.25 using optical and near-IR HST imaging reaching to at least 3 magnitudes fainter than $M^*$.
Bremer, M. N. +2 more
core +1 more source
Deuterium at high-redshift: Primordial abundance in the zabs = 2.621 damped Ly-alpha system towards CTQ247 [PDF]
, 2012 The detection of neutral deuterium in the low-metallicity damped Lyman-{\alpha} system at zabs = 2.621 towards the quasar CTQ247 is reported. Using a high signal-to-noise and high spectral resolution (R = 60000) spectrum from the Very Large Telescope Ultraviolet and Visual Echelle Spectrograph, we precisely measure the deuterium-to-oxygen ratio log N ...
arxiv +1 more source
Element Abundances at High-redshift: Magellan MIKE Observations of sub-Damped Lyman-alpha Absorbers at 1.7 < z <2.4 [PDF]
, 2013 We present chemical abundance measurements from high-resolution observations of 5 sub-damped Lyman-alpha absorbers at 1.7 < z < 2.4 observed with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5-m Magellan II Clay telescope. Lines of Zn II, Mg I, Mg II, Al II, Al III, S II, Si II, Si IV, C II, C II*, C IV, Ni II, Mn II and Fe II were
arxiv +1 more source