Specific Star Formation Rates

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dc.creatorBauer, Amanda E.
dc.creatorDrory, Niv
dc.creatorHill, Gary J.
dc.date2005-09-02
dc.date.accessioned2026-07-07T02:18:34Z
dc.date.available2026-07-07T02:18:34Z
dc.descriptionWe present results from a study to determine how star formation contributes to galaxy growth since redshift z=1.5. Using galaxies from the MUnich Near-Infrared Cluster Survey (MUNICS) and the FORS Deep Field (FDF), we investigate the specific star formation rate (SSFR, star formation rate [SFR] per unit galaxy stellar mass) as a function of galaxy stellar mass and redshift. We test the compatibility of our results with a sample drawn from a larger volume using the Sloan Digital Sky Survey. We find that the SSFR decreases as galaxy stellar mass increases, suggesting that star formation contributes more to the growth of low-mass galaxies than high-mass galaxies at all redshifts in this study. We also find a ridge in the SSFR that runs parallel to lines of constant SFR and decreases by a factor of 10 from z=1 to today, matching the results of the evolution in SFR density seen in the ``Lilly-Madau'' diagram. The ridge evolves independently of galaxy stellar mass to a particular turnover mass at the high mass end. Galaxies above the turnover mass show a sharp decrease in SSFR compared to the average at that epoch, and the turnover mass increases with redshift.
dc.description6 pages, 1 figure, proceedings for "Island Universes: Structure and Evolution of Disk Galaxies"
dc.identifierhttps://arxiv.org/abs/astro-ph/0509059
dc.identifierhttp://arxiv.org/abs/astro-ph/0509059
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/9536
dc.subjectAstrophysics
dc.titleSpecific Star Formation Rates
dc.typetext

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