Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974csgr.conf..253s&link_type=abstract
In ESRO The Context and Status of Gamma Ray Astronomy p 253-257 (SEE N75-25813 16-93)
Astronomy and Astrophysics
Astronomy
3
Carbon Monoxide, Galactic Radiation, Gamma Rays, Radiation Distribution, Radio Emission, Cosmic Rays, Emission Spectra, Galactic Structure, Gas Density, Hydrogen Clouds, Interstellar Gas, Line Spectra, Molecular Gases, Sas, Satellite Observation, Spiral Galaxies
Scientific paper
Recent measurements of the galactic CO distribution as evidenced from 2.6 mm radio observations of the CO emission line intensity are correlated with the SAS-2 measurements of galactic gamma ray emission. Both distributions are indicative of a ring-shaped distribution or arm consisting of cool clouds of molecular hydrogen at a galactocentric distance of approximately 5 kpc. The mean density of H2 in this region is estimated to be between 1 and 5 cu cm. Both a galactic and extra-galactic origin of cosmic rays are consistent with the observations, although the presence of dynamical effects and increased star formation at 5 kpc in the dense molecular clouds may be connected with an increase in cosmic-ray production.
Solomon Philip M.
Stecker Floyd W.
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