Galaxy evolution by color-log(n) type since redshift unity in the Hubble Ultra Deep Field

Details Galaxy evolution by color-log(n) type since redshift unity in the Hubble Ultra Deep Field Galaxy evolution by color-log(n) type since redshift unity in the Hubble Ultra Deep Field

2008-11-06

arxiv.org/abs/0811.1043v1

Astronomy and Astrophysics

Astrophysics

12 pages, 6 figures, to be published in A&A (accepted 29/10/08)

Scientific paper

10.1051/0004-6361:20078558

We explore the use of the color-log(n) plane (where n is the global Sersic index) as a tool for subdividing the high redshift galaxy population in a physically-motivated manner. Using a series of volume-limited samples out to z=1.5 in the Hubble Ultra Deep Field (UDF) we confirm the correlation between color-log(n) plane position and visual morphology observed locally and in other high redshift studies in the color and/or structure domain. Via comparison to a low redshift sample from the Millennium Galaxy Catalogue we quantify evolution by color-log(n) type, accounting separately for the specific selection and measurement biases against each. Specifically, we measure decreases in B-band surface brightness of 1.57 +/- 0.22 mag/sq.arcsec and 1.65 +/- 0.22 mag/sq.arcsec for `blue, diffuse' and `red, compact' galaxies respectively between redshift unity and the present day.

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