Arp 220 - IC 4553/4: understanding the system and diagnosing the ISM

Abstract

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.

9 pages, 4 figures, to appear in: IAU Symposium 242 Astrophysical Masers and their Environments

References in corpus (12)

• Rotating Nuclear Rings and Extreme Starbursts in Ultraluminous Galaxies
• What Powers Ultra-luminous IRAS Galaxies?
• The Molecular Interstellar Medium in Ultraluminous Infrared Galaxies
• NICMOS Imaging of Infrared-Luminous Galaxies
• Counterrotating Nuclear Disks in Arp 220
• VLBI Images of 49 Radio Supernovae in Arp 220
• Is HCN a True Tracer of Dense Molecular Gas in LIRGs and ULIRGs?
• The radio spectra of the compact sources in Arp 220: A mixed population of supernovae and supernova remnants
• Irradiated ISM: Discriminating between Cosmic Rays and X-rays
• Fe K emission in the ultraluminous infrared galaxy Arp220
• Continuum and spectral line observations of the OH Megamaser galaxy Arp 220
• Interferometric Observations of the Nuclear Region of Arp220 at Submillimeter Wavelengths