The use of gamma rays to trace the local interstellar hydrogen

Details The use of gamma rays to trace the local interstellar hydrogen The use of gamma rays to trace the local interstellar hydrogen

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ssrv...36..267s&link_type=abstract

(International Astronomical Union, Meeting on Galactic Astrophysics and Gamma-Ray Astronomy, Patras, Greece, Aug. 19, 1982) Spac

Astronomy and Astrophysics

Astronomy

Cos-B Satellite, Cosmic Rays, Gamma Ray Astronomy, Hydrogen Clouds, Interstellar Gas, Particle Interactions, Angular Distribution, Astronomical Maps, Interstellar Extinction

Scientific paper

COS-B data in the latitude range 11° < |b| < 19° show the gamma-ray intensity to be closely correlated with the total line-of-sight absorption derived from galaxy counts. It is found that to a good approximation the gamma-ray intensity is proportional to the total gas column density, and on this basis a map of the angular distribution of local molecular hydrogen at intermediate latitudes is presented. Comparing this with a similar map produced from galaxy counts, several structures appear in both maps in regions related to Gould's Belt and elsewhere. Some regions in the southern celestial hemisphere not accessible in galaxy counts show high molecular hydrogen column densities.

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