Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21730902g&link_type=abstract
American Astronomical Society, AAS Meeting #217, #309.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
The formation of the red sequence remains a challenge for models of galaxy evolution. We test simplified models of star formation quenching, including quenching associated with mergers or a hot gas halo, in a cosmological context with fully hydrodynamic simulations. Due to difficulties with resolution and uncertainties in accretion physics, we avoid specifically invoking supermassive black holes in our models. Instead, we try to approximate the effects of feedback required to create the red sequence. Using straightforward prescriptions introduced on-the-fly in the simulations, I will show that alone, powerful galactic winds during major mergers cannot yield a substantial red sequence. In contrast, quenching models where we add energy to hot gas halos successfully match the z=0 red galaxy luminosity function. Since we track the full gas dynamics, this work opens windows to further constraints on feedback mechanisms, such as hot gas properties in galaxy groups and clusters.
Dav'e Romeel
Gabor Jared
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