AAS 197, January 2001
Session 40. REU: Instrumentation, Star Clusters and Galaxies
Display, Tuesday, January 9, 2001, 9:30am-7:00pm, Exhibit Hall

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[40.10] Chandra Observations of Arp 220

S. Shaked (Steward Observatory, U. Arizona), J. McDowell (CfA), D. Clements (Cardiff Univ.), K. Borne (GSFC), S. Lamb (U. Illinois, Urbana Champaign), A. C. Baker (Cardiff Univ.), C. Mundell (Liverpool John Moore's Univ.), L. Colina (STScI)

We analyze recent {\em Chandra} data of the ultraluminous infrared galaxy Arp 220 and compare it to previously acquired ROSAT data. {\em Chandra's} high resolution allows us to see that a concentrated source of hard X-ray emission is located within 2'' (<1 kpc) of the radio/infrared nuclei. By comparing our {\em Chandra} data to H\alpha data, we find that the extended X-ray nebula coincides with the H\alpha morphology thus supporting the double-bubble ``superwind'' theory of Heckman et al. 1996. Finally, we find that the southern cluster seen in the ROSAT image is resolved into point-like sources, the positions of which coincide with bright optical galaxies.

Funding was provided by the NSF REU program.

The author(s) of this abstract have provided an email address for comments about the abstract: shannas@u.arizona.edu

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