Galaxy Evolution and Star Formation Efficiency in the Last Half of the Universe
Abstract
We present the results of a CO(1-0) emission survey with the IRAM 30m of 30 galaxies at moderate redshift (z ~ 0.2-0.6) to explore galaxy evolution and in particular the star formation efficiency, in the redshift range filling the gap between local and very high-z objects. Our detection rate is about 50%. One of the bright objects was mapped at high resolution with the IRAM interferometer, and about 50% of the total emission found in the 27 arcsec (97 kpc) single dish beam is recovered by the interferometer, suggesting the presence of extended emission. The FIR-to-CO luminosity ratio is enhanced, following the increasing trend observed between local and high-z ultra-luminous starbursts.
Keywords
Cite
@article{arxiv.0709.1172,
title = {Galaxy Evolution and Star Formation Efficiency in the Last Half of the Universe},
author = {F. Combes and S. Garcia-Burillo and J. Braine and E. Schinnerer and F. Walter and L. Colina and M. Gerin},
journal= {arXiv preprint arXiv:0709.1172},
year = {2007}
}
Comments
6 pages, 5 figures, To appear in the proceedings of "SF2A-2007: Semaine de l'Astrophysique Francaise", (J. Bouvier, A. Chalabaev, and C. Charbonnel eds)