The molecular content of Messier 81

Details The molecular content of Messier 81 The molecular content of Messier 81

May 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...196l..17b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 196, no. 1-2, May 1988, p. L17-L19.

Astronomy and Astrophysics

Astrophysics

29

Carbon Monoxide, Density Distribution, Interstellar Matter, Spiral Galaxies, Gas Density, Hydrogen, Line Spectra

Scientific paper

The authors have mapped a large fraction of the disk of M81 in the CO (1-0) line with 1 arcmin resolution (1 kpc). The molecular distribution in this galaxy is characterized by a central depletion, a maximum density between 4 and 7 kpc from the center and confinement to spiral arms. The mean surface density ratio σH2/σHI at the detected CO positions is 0.4 and the molecular component represents only a small fraction of the total interstellar mass. The H2 component of M81 thus appears very similar to that of the Andromeda galaxy.

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