The remarkable infrared galaxy ARP 220 = IC 4553

Creators: Soifer, B. T.; Neugebauer, G.; Helou, G.; Lonsdale, C. J.; Hacking, P.; Rice, W.; Houck, J. R.; Low, F. J.; Rowan-Robinson, M.

Abstract

IRAS observations of the peculiar galaxy Arp 220 = IC 4553 show that it is extremely luminous in the far-infrared with a total luminosity of - 2 X 10^(12) L_☉. The infrared-to-blue luminosity ratio of this galaxy is - 80, which is the largest value of the ratio for galaxies in the UGC catalog, and places it in the range of the "unidentified" infrared sources recently reported by Houck et al. in the IRAS all-sky survey. Other observations of Arp 220, combined with the luminosity in the infrared, allow either a Seyfert-like or starburst origin for this luminosity.

Additional Information

© 1984 American Astronomical Society. Received 1984 March 12; accepted 1984 May 15. It is a pleasure to thank our many colleagues in the IRAS project Science Data Analysis System for assisting in the reduction of the data used here. We thank Harm Rahing and George Miley for a careful reading of the manuscript. The work described here was supported in part through the Jet Propulsion Laboratory; California Institute of Technology, under contract with NASA.

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