Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...395..461t&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 395, no. 2, Aug. 20, 1992, p. 461-465.
Astronomy and Astrophysics
Astronomy
39
Galactic Structure, Infrared Astronomy, Star Clusters, Star Formation, Starburst Galaxies, Giant Stars, Molecular Clouds, Point Sources, Supernova Remnants, X Ray Sources
Scientific paper
We 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.
Gezari Daniel Ysa
Telesco Charles M.
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