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The Growth of Central and Satellite Galaxies in Cosmological Smoothed Particle Hydrodynamics Simulations
Vimal Simha, David H. Weinberg, Romeel Dave +3
We examine the accretion and merger histories of central and satellite galaxies in a smoothed particle hydrodynamics (SPH) cosmological simulation that resolves galaxies down to 7e…
Dark Matter Halos of Disk Galaxies: Constraints from the Tully-Fisher Relation
Oleg Y. Gnedin, David H. Weinberg, James Pizagno +2
We investigate structural properties of dark matter halos of disk galaxies in LCDM cosmology, using a well-defined sample of 81 disk-dominated galaxies from the SDSS redshift surve…
Photoionization Feedback in Low--Mass Galaxies at High Redshift
Mark Dijkstra, Zoltan Haiman, Martin J. Rees +1
The cosmic ultraviolet (UV) ionizing background impacts the formation of dwarf galaxies in the low-redshift universe (z=3) by suppressing gas infall into galactic halos with circul…
Comparing Simulations and Observations of the Lyman-Alpha Forest I. Methodology
C. E. Petry, C. D. Impey, N. Katz +2
We describe techniques for comparing spectra extracted from cosmological simulations and observational data, using the same methodology to link Lyman-alpha properties derived from…
Metal Enrichment of the Intergalactic Medium in Cosmological Simulations
Anthony Aguirre, Lars Hernquist, Joop Schaye +3
Observations have established that the diffuse intergalactic medium (IGM) at z ~ 3 is enriched to ~0.1-1% solar metallicity and that the hot gas in large clusters of galaxies (ICM)…
Metal Enrichment of the Intergalactic Medium at z=3 by Galactic Winds
Anthony Aguirre, Lars Hernquist, Joop Schaye +3
Studies of quasar absorption lines reveal that the low density intergalactic medium at z ~ 3 is enriched to 0.001-0.01 solar metallicity. This enrichment may have occurred in an ea…