Infrared imaging and polarimetry of M82 - Evidence for a ring of warm dust

Details Infrared imaging and polarimetry of M82 - Evidence for a ring of warm dust Infrared imaging and polarimetry of M82 - Evidence for a ring of warm dust

Oct 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1260d&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Oct. 1989, p. 1260-1264. Research supported by the University of Wyoming, Univer

Astronomy and Astrophysics

Astronomy

21

Cosmic Dust, Infrared Astronomy, Polarimetry, Starburst Galaxies, Astronomical Maps, Infrared Imagery, Near Infrared Radiation

Scientific paper

Images of the starburst galaxy M82 at 10 microns and 19.5 microns reveal a pair of emission peaks symmetrically flanking the 2.2-micron nucleus. It is argued that these peaks, which lie interior to the CO/H I lobes and along the major axis of the galaxy, are produced by a ring of warm dust heated by young stars of the starburst. Near-infrared polarization measurements of the nucleus show 1-percent linear polarization oriented almost perpendicular to the major axis of the galaxy. This polarization is attributed to scattering by the circumnuclear dust ring. Photometry and polarimetry of the brightest extranuclear source of 2.2-micron emission (K2) are also presented.

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