Galaxy Evolution over the Last Eight Billion Years

Details Galaxy Evolution over the Last Eight Billion Years Galaxy Evolution over the Last Eight Billion Years

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21722901z&link_type=abstract

American Astronomical Society, AAS Meeting #217, #229.01; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We study galaxy evolution over the last eight billion years with large, deep galaxy surveys, PRIMUS, SDSS and DEEP2. Galaxies have changed dramatically over this period of time. The global star formation rate has declined by roughly an order-of-magnitude. Red galaxies have grown substantially in number and mass. Blue galaxies have faded and grown redder as their star formation rate dropped. I demonstrate these evolutionary features with new results from these surveys. I also introduce PRIMUS, the largest faint galaxy survey to date. We have measured 140,000 robust redshifts to the depths of i (AB) 23 up to z 1, covering 9.1 square degrees of the sky. I show that with the existing deep multi-wavelength imaging in PRIMUS fields we are able to study the evolution in greater detail and investigate proposed physical mechanisms responsible for the evolution.

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