M82 at 7mm

Details M82 at 7mm M82 at 7mm

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21114103t&link_type=abstract

American Astronomical Society, AAS Meeting #211, #141.03; Bulletin of the American Astronomical Society, Vol. 39, p.991

Astronomy and Astrophysics

Astronomy

Scientific paper

We present VLA 7mm radio continuum images of M82 at arcsecond and sub-arcsecond resolutions. The 7mm emission is dominated by the thermal free-free radiation, allowing us to trace the O star population at two different size scales. We identify sources with rising spectra and sizes of few pc across, and argue that they are compact HII regions with ne 104 cm3. We see unusual extended regions of relatively high emission measure; the high pressure in M82 may allow them to exist. The correlations between the distributions on arcsecond scales of thermal free-free (7mm), PAH feature (Spitzer IRAC 8 micron), CO(1-0) and HCN(1-0) emission are discussed.

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