Gamma-rays from atomic and molecular gas in the first galactic quadrant

Details Gamma-rays from atomic and molecular gas in the first galactic quadrant Gamma-rays from atomic and molecular gas in the first galactic quadrant

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...274..231l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 274, Nov. 1, 1983, p. 231-236.

Astronomy and Astrophysics

Astronomy

99

Carbon Monoxide, Galactic Radiation, Gamma Rays, Hydrogen Atoms, Interstellar Gas, Astronomical Maps, Milky Way Galaxy, Millimeter Waves, Radiant Flux Density, Radio Sources (Astronomy)

Scientific paper

The fully sampled Columbia 1 deg CO survey and the Berkeley H I survey are compared with the COS B gamma-ray survey. As a first step, the study is limited to the high-energy gamma-rays (E greater than 300 MeV). It is found that a simple model, in which uniformly distributed cosmic rays interact with the interstellar gas, as traced by H I and CO, can account for almost all the observed gamma-rays. Furthermore, if the contribution from point sources to the gamma-ray flux is significant, these sources must have a galactic distribution similar to that of CO. The analysis permits calibration of the ratio between H2 column density and integrated CO line intensity: N(H2)/W(CO) = (1-3) 10 to the 20th molecules per sq cm k km per s.

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