Cosmological evolution and hierarchical galaxy formation
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 309:4 (1999) 823-832
QSO clustering and the AAT 2dF QSO redshift survey
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 357:1750 (1999) 185-198
The halo formation rate and its link to the global star formation rate
ASTR SOC P 193 (1999) 525-528
Abstract:
The star formation history of the universe shows strong evolution with cosmological epoch. Although we know mergers between galaxies can cause luminous bursts of star formation, the relative importance of such mergers to the global star formation rate (SFR) is unknown. We present a simple analytic formula for the rate at which halos merge to form higher-mass systems, derived from Press-Schechter theory and confirmed by numerical simulations (for high halo masses). A comparison of the evolution in halo formation rate with the observed evolution in the global SFR indicates that the latter is largely driven by halo mergers at z > 1. Recent numerical simulations by Kolatt et al. (1999) and Knebe & Muller (1999) show how merging systems are strongly biased tracers of mass fluctuations, thereby explaining the strong clustering observed for Lyman-break galaxies without any need to assume that Lyman-break galaxies are associated only with the most massive systems at z similar to 3.The 2dF QSO Redshift Survey
ArXiv astro-ph/9810127 (1998)
Abstract:
We present preliminary results from the 2-degree Field (2dF) QSO Redshift Survey currently under way at the Anglo-Australian Telescope. This survey aims to determine the redshifts of >25000 QSOs over a redshift range of 0.3The galaxy halo formation rate
ArXiv astro-ph/9809330 (1998)