The distribution of molecular gas in the Galaxy

Details The distribution of molecular gas in the Galaxy The distribution of molecular gas in the Galaxy

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987qjras..28..277p&link_type=abstract

Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), vol. 28, Sept. 1987, p. 277-283.

Astronomy and Astrophysics

Astronomy

6

Gas Flow, Infrared Spectra, Milky Way Galaxy, Molecular Gases, Spectrum Analysis, Galactic Nuclei, Infrared Astronomy Satellite, Mass Distribution, Star Formation, Stellar Evolution

Scientific paper

After a brief introduction and description of the history of attempts to determine the distribution of molecular gas in the Galaxy, new results based on an analysis of recent infrared data obtained by the IRAS satellite and from elsewhere are given. All methods lead to estimates for the total mass of molecular gas in the inner Galaxy (R less than 10 kpc) not inconsistent with the value of 6 x 10 to the 8th solar masses found by Bhat et al. (1985), and imply a value of 1.0 + or - 0.3 for the ratio of H2 to H I in the important range of R = 4-8 kpc. Near the Galactic center (R less than 0.5 kpc), the resulting mass of molecular gas, (2-4) x 10 to the 7th solar masses, is again not inconsistent with the earlier estimate and is much lower than many estimates from CO emission.

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