NTRS - NASA Technical Reports Server

Back to Results
Chandra Observations of Extended X-Ray Emission in ARP 220We resolve the extended X-ray emission from the prototypical ultraluminous infrared galaxy Arp 220. Extended, faint, edge-brightened, soft X-ray lobes outside the optical galaxy are observed to a distance of 1CL 15 kpc on each side of the nuclear region. Bright plumes inside the optical isophotes coincide with the optical line emission and extend 1 1 kpc from end to end across the nucleus. The data for the plumes cannot be fitted by a single-temperature plasma and display a range of temperatures from 0.2 to 1 keV. The plumes emerge from bright, diffuse circumnuclear emission in the inner 3 kpc centered on the Ha peak, which is displaced from the radio nuclei. There is a close morphological correspondence between the Ha and soft X-ray emission on all spatial scales. We interpret the plumes as a starburst-driven superwind and discuss two interpretations of the emission from the lobes in the context of simulations of the merger dynamics of Arp 220.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
McDowell, J. C. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Clements, D. L. (Imperial Coll. of Science, Technology and Medicine London, United Kingdom)
Lamb, S. A. (Illinois Univ. Urbana, IL, United States)
Shaked, S. (Arizona Univ. Tucson, AZ, United States)
Hearn, N. C. (Illinois Univ. Urbana, IL, United States)
Colina, L. (Consejo Superior de Investigaciones Cientificas Madrid, Spain)
Mundell, C. (Liverpool John Moores Univ. Liverpool, United Kingdom)
Borne, K. (Raytheon Information Technology and Scientific Services Greenbelt, MD, United States)
Baker, A. C. (Cardiff Univ. United Kingdom)
Arribas, S. (Space Telescope Science Inst. Baltimore, MD, United States)
Date Acquired
August 22, 2013
Publication Date
July 1, 2003
Publication Information
Publication: The Astrophysical Journal
Volume: 591
ISSN: 0004-637X
Subject Category
Funding Number(s)
Distribution Limits