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High-resolution 12.4 micron images of the starburst region in M82We present 12.4 micron images, made with 1" resolution, of the intense star-forming region in the galaxy M82. Considerable small-scale structure is evident, including several bright clumps less than about 20 pc in size which may be embedded with giant star clusters more massive than 3 x 100,000 solar mass. No correlation is seen between the infrared emission and the bright radio/X-ray point sources which are thought to be very young supernova remnants. We propose that high values of the ratio of nonthermal and infrared emission near the nucleus, and of the ratio LIR/LCO at one of the starburst lobes, can be attributed to disruption of the central region by supernova activity. However, we argue that the midinfrared-emitting dust is heated by young stars and not, as recently proposed, by supernova shocks.
Document ID
19920074263
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Telesco, C. M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gezari, D. Y.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 15, 2013
Publication Date
August 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 395
Issue: 2 Au
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A56887
Funding Number(s)
PROJECT: RTOP 188-44-23-08
Distribution Limits
Public
Copyright
Other

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