Title:
   The SMA CO(6-5) and 690 GHz continuum observations of Arp 220

Authors:
   S. Matsushita, D. Iono, C.-Y. Chou, M. Gurwell, P.-Y. Hsieh,
   T. Hunter, J. Lim, S. Muller, A.B. Peck, G. Petitpas, K. Sakamoto,
   S. Sawada-Satoh, Dinh-V-Trung, M.C. Wiedner, D. Wilner

Presentation:
   Poster

Abstract:
Arp 220 is one of the nearby prototypical ultra luminous infrared
galaxies, with an infrared luminosity and distance of 1.4x10^12
L_sun and 77 Mpc, respectively.  It is believed that this galaxy is
in the final stage of merger, because of the disturbed appearance
of the galaxy and two nuclei at the center.  Most of molecular and
continuum emissions are concentrated at the two nuclei with its
separation only about 1".  Observing higher-J CO lines and dust
emission from this extreme starburst region with high angular
resolution will constrain their properties.  We therefore observed
Arp 220 with the CO(6-5) line and 690 GHz continuum emission at
690 GHz testing and commissioning epoch (February 2005).  We used
6 antennas in the compact configuration, and obtained images with
the synthesized beam size of about 1.2"x0.8".  We detected both the
line and continuum emissions from the galaxy, which mostly comes
from the western nucleus.  We will present more details at the
meeting.