Galaxies-intergalactic medium interaction calculation - I. Galaxy formation as a function of large-scale environment

Robert A. Crain, Tom Theuns, Claudio Dalla Vecchia, Vincent R. Eke, Carlos S. Frenk, Adrian Jenkins, Scott T. Kay, John A. Peacock, Frazer R. Pearce, Joop Schaye, Volker Springel, Peter A. Thomas, Simon D. M. White, Robert P. C. Wiersma

Research output: Contribution to journalArticlepeer-review

Abstract

We present the first results of hydrodynamical simulations that follow the formation of galaxies to the present day in nearly spherical regions of radius ~20h-1Mpc drawn from the Millennium Simulation (Springel et al.). The regions have mean overdensities that deviate by (-2, -1, 0, +1, +2)σ from the cosmic mean, where σ is the rms mass fluctuation on a scale of ~20h-1Mpc at z = 1.5. The simulations have mass resolution of up to ~106h-1Msolar, cover the entire range of large-scale cosmological environments, including rare objects such as massive clusters and sparse voids, and allow extrapolation of statistics to the (500h-1Mpc)3 Millennium Simulation volume as a whole. They include gas cooling, photoheating from an imposed ionizing background, supernova feedback and galactic winds, but no AGN. In this paper, we focus on the star formation properties of the model. We find that the specific star formation rate density at z
Original languageEnglish
Pages (from-to)1773-1794
JournalMonthly Notices of the Royal Astronomical Society
Volume399
DOIs
Publication statusPublished - 1 Nov 2009

Fingerprint Dive into the research topics of 'Galaxies-intergalactic medium interaction calculation - I. Galaxy formation as a function of large-scale environment'. Together they form a unique fingerprint.

Cite this