Are truncated stellar disks linked to the molecular gas density?
Abstract
We know that the slope of the radial, stellar light distribution in galaxies is well described by an exponential decline and this distribution is often truncated at a break radius (). We don't have a clear understanding for the origin of these outer truncations and several hypotheses have been proposed to explain them. We want to test the various theories with direct observations of the cold molecular gas for a few truncated galaxies in comparison with the non-truncated ones. The answer to the existence of a possible link between truncated stellar disks and the molecular gas density cannot be obtained from CO maps in the literature, because so far there are no galaxies with a clear truncation observed in CO at high resolution.
Keywords
Cite
@article{arxiv.astro-ph/0702018,
title = {Are truncated stellar disks linked to the molecular gas density?},
author = {V. Casasola and F. Combes and D. Bettoni and M. Pohlen and G. Galletta and F. Tenaglia},
journal= {arXiv preprint arXiv:astro-ph/0702018},
year = {2007}
}
Comments
3 pages, 6 figures, to appear in Astrophysics and Space Science (Apss), special issue of "Science with ALMA: a new era for Astrophysics" conference, ed. Dr. Bachiller