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Accretion-regulated star formation in late-type galaxies

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arxiv 1011.2758 v1 pith:47AHE6ON submitted 2010-11-11 astro-ph.CO

Accretion-regulated star formation in late-type galaxies

classification astro-ph.CO
keywords formationstaraccretionaccretion-regulatedgalaxiesgalaxyratedetermined
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We develop a four-phase galaxy evolution model in order to study the effect of accretion of extra-galactic gas on the star formation rate (SFR) of a galaxy. Pure self-regulated star formation of isolated galaxies is replaced by an accretion-regulated star formation mode. The SFR settles into an equlibrium determined entirely by the gas accretion rate on a Gyr time scale.

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  1. Self-regulated galaxy evolution within a self-consistently varying galaxy-wide IMF

    astro-ph.GA 2026-04 unverdicted novelty 4.0

    A metallicity- and SFR-dependent galaxy-wide IMF in semi-analytical models reproduces the mass-metallicity relation and quenched ellipticals more accurately than constant-IMF models, with self-regulation set by gas ac...