Arp220 is a nearby system in final stages of galaxy merger with powerful ongoing star-formation at and surrounding the two nuclei. Arp 220 was detected in HI absorption and OH Megamaser emission and later recognized as the nearest ultra-luminous infrared galaxy also showing powerful molecular and X-ray emissions. In this paper we review the available radio and mm-wave observational data of Arp 220 in order to obtain an integrated picture of the dense interstellar medium that forms the location of the powerful star-formation at the two nuclei.
@article{arxiv.0709.3441,
title = {Arp 220 - IC 4553/4: understanding the system and diagnosing the ISM},
author = {W. A. Baan},
journal= {arXiv preprint arXiv:0709.3441},
year = {2009}
}
Comments
9 pages, 4 figures, to appear in: IAU Symposium 242 Astrophysical Masers and their Environments