Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237.1075b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 15, 1989, p. 1075-1084.
Astronomy and Astrophysics
Astronomy
7
Far Infrared Radiation, Interstellar Gas, Mass Distribution, Milky Way Galaxy, H I Regions, H Ii Regions, Hydrogen, Infrared Astronomy Satellite
Scientific paper
An analysis has been made of the available FIR data in the wavelength range 60-250 microns along the Galactic plane in order to study the distribution of the mass of gas in molecular form in the Inner Galaxy. A model is used in which the dust-to-gas ratio increases slowly towards the Galactic center, in a manner proportional to metallicity, and a number of other assumptions are made that are shown to be reasonable from comparison with the well known H I component locally. The total FIR emission is attributed to three basic components, i.e., dust associated with H I, H II and H2, each of which has its own temperature as a function of Galactic longitude. By achieving a best fit to all the data at each wavelength it is possible to isolate the H2 component for detailed study. The result is that the total mass of the H2 in the Inner Galaxy is (6.1 + or - 2.7) x 10 to the 8th solar masses.
Broadbent Anne
MacLaren Ian
Wolfendale Arnold W.
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