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Galaxy Environments in DEEP2: The Birth of the Red Sequence

Published online by Cambridge University Press:  01 August 2006

Michael C. Cooper  and
Jeffrey A. Newman
Michael C. Cooper
Affiliation:
Dep't of Astronomy, University of California at Berkeley, Berkeley, CA 94720, USA email: cooper@astro.berkeley.edu; jnewman@astro.berkeley.edu
Jeffrey A. Newman
Affiliation:
Dep't of Astronomy, University of California at Berkeley, Berkeley, CA 94720, USA email: cooper@astro.berkeley.edu; jnewman@astro.berkeley.edu
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The galaxy population at z ≲ 1 is effectively described as a combination of two distinct types: red, early-type galaxies lacking much star formation and blue, late-type galaxies with active star formation. For the red galaxy population, recent work by Bell et al. (2004) has shown that the number density of ~L* galaxies on the red sequence has risen by a factor of ~2 from z ~ 1 to z ~ 0. A variety of complementary observations suggests that the build-up of galaxies on the red sequence results from 2 distinct evolutionary trends: (1) the quenching of star formation in blue galaxies and their subsequent migration onto the red sequence and (2) the dissipationless or (“dry”) merging of red-sequence galaxies.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 167 - 169
Copyright
Copyright © International Astronomical Union 2007

References

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