(C-12)O (J = 2-1) mapping of M 82

Details (C-12)O (J = 2-1) mapping of M 82 (C-12)O (J = 2-1) mapping of M 82

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228..331l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 2, Feb. 1990, p. 331-340. Research supported by the Japan Society for

Astronomy and Astrophysics

Astronomy

76

Carbon Monoxide, Extragalactic Radio Sources, Infrared Sources (Astronomy), Molecular Spectra, Peculiar Galaxies, Galactic Nuclei, Galactic Rotation, Halos, Line Spectra, Luminosity, Rotational Spectra, Starburst Galaxies

Scientific paper

The (C-12)O(J = 2-1) emission of M 82 was mapped with an angular resolution of 13 arcsec. The data have been compared with the (C-12)O(J = 1-0) observations of M 82 with a 16 arcsec beam made in the same area. A clear ring of CO is seen rotating around the center of M 82. Differences in the (J = 2-1) to (J = 1-0) intensity ratios are interpreted as variations in the optical depth and/or excitation temperature. Based on the CO data it is found that the gas rotates more slowly in the halo than in the disk of M 82.

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