Nature and nurture in galaxy formation simulations

Leiden Repository

Nature and nurture in galaxy formation simulations

Type: Doctoral Thesis
Title: Nature and nurture in galaxy formation simulations
Author: Haas, Marcel Richard
Publisher: Leiden Observatory, Faculty of Science, Leiden University
Issue Date: 2010-12-07
Keywords: Galaxy formation
Simulation
Sub-grid
Cosmological
Luminosity function
Environment
Abstract: We study several aspects of the formation of galaxies, using numerical simulations. We investigate the influence of about thirty different sub-grid physics recipes for cooling, star formation, supernova feedback, AGN feedback etc. on the resulting galaxy populations with large SPH simulations. We investigate several parameters that quantify the environment of galaxies and present the strongest measure of halo mass and a new parameter that is insensitive to halo mass. We look at the effects of input physics and dust attenuation on the simulated luminosity functions and compare luminosity functions directly obtained from simulations, with those using observers' tools on mock images. Regardless of most parameters used for the mock image creation and the detection of sources, these two LFs agree well. The last chapter compares several ways of sampling stellar IMFs in clusters that follow a cluster mass function in order to see how the choice of CMF and sampling method influence the resulting integrated galactic initial mass function. The effects are only significant if the CMF extends as a steep power-law down to a few solar masses. We study the effects of these IGIMFs on the galaxies' integrated photometry and metal and O-star content.
Description: Promotor: M. Franx, Co-promotor: J. Schaye
With Summary in Dutch
Faculty: Faculteit der Wiskunde en Natuurwetenschappen
Citation: Haas, M.R., 2010, Doctoral Thesis, Leiden University
Handle: http://hdl.handle.net/1887/16207
 

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