Mathematics – Logic
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..396..417a&link_type=abstract
Formation and Evolution of Galaxy Disks ASP Conference Series, Vol. 396, Proceedings of the conference held 1-5 October, 2007 at
Mathematics
Logic
Scientific paper
We present an analysis of the surface brightness profiles of a sample of 435 late type galaxies with redshift extending up to z˜1. We have used imaging data from GOODS-South HST/ACS tep{Giavalisco04}. We have classified the profiles, obtained at a constant rest-frame wavelength (˜ B band), noting the existence and type of `breaks' in them. In the above sample, 242 are classified as Type II (i.e., `truncated' or `downbending'). Focusing on these galaxies, we show results on their break radii (i.e., a direct estimator of the size of the stellar disk) and surface brightness at the break. This is explored as a function of redshift. This sample of Type II galaxies at mid-high redshift is an order of magnitude larger than those reported in analogous previous studies. Our results suggest that, at a given stellar mass, the radial position of the break has increased with cosmic time by a factor of 1.4 in the last ˜8 Gyr. This is in agreement with a moderate inside-out growth of the disk galaxies since z˜1. After correcting from the cosmological dimming, we also report an increase of ˜3 mag arcsec^{-2} in the surface brightness at the break position in the same period.
Azzollini Ruyman
Beckman John E.
Trujillo Ignacio
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