Bibcode
Azzollini, R.; Trujillo, I.; Beckman, J. E.
Bibliographical reference
Formation and Evolution of Galaxy Disks ASP Conference Series, Vol. 396, Proceedings of the conference held 1-5 October, 2007 at the Centro Convegni Matteo Ricci, Rome, Italy. Edited by José G. Funes, S.J., and Enrico Maria Corsini. San Francisco: Astronomical Society of the Pacific, 2008., p.417
Advertised on:
10
2008
Citations
0
Refereed citations
0
Description
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.