Disks in the Arp220 nuclei: modeling high resolution line and continuum observations
Genzel, R.; Tacconi, L. J.; Yun, M. S.; Scoville, N. Z.; Wood, K.; Sakamoto, K.; Crosas, M.
United States, Germany
Abstract
We model molecular and near-infrared emission from the central region of the ultra-luminous infrared galaxy Arp220. We use high angular resolution CO data taken with the Owens Valley millimeter array and NIR images from HST/NICMOS to compare with Monte Carlo line radiative transfer and scattering models. The models suggest that each one of the two nuclei of Arp220 has a dusty molecular disk with a mass of about 109 Msolar, which is in Keplerian rotation.