Constraints on the galactic distribution of cosmic rays from the COS-B gamma-ray data

Details Constraints on the galactic distribution of cosmic rays from the COS-B gamma-ray data Constraints on the galactic distribution of cosmic rays from the COS-B gamma-ray data

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....1..329b&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 1 p 329-332 (SEE N85-33902 22-93)

Astronomy and Astrophysics

Astronomy

Cosmic Gases, Cosmic Rays, Gamma Rays, Interstellar Matter, Radial Distribution, Radiant Flux Density, Spatial Distribution, Bremsstrahlung, Carbon Monoxide, Electrons, Emissivity, Galactic Nuclei, Hydrogen, Protons

Scientific paper

The diffuse component of the galactic high energy gamma rays results mainly from the interaction of CR nuclei and electrons with the nuclei of the interstellar gas. An additional contribution is obtained from the interaction of CR electrons with the interstellar photons through the inverse-Compton (IC) process. Gamma ray astronomy therefore offers an excellent means to study the distribution of CR particles throughout the Galaxy, but it is essential to know the distribution of the target interstellar gas particles, the major constituents being atomic and molecular hydrogen. Large scale millimeter wave surveys of the CO molecule covering more than half of the Milky Way, obtained with the Columbia 1.2 m telescopes, are currently available and are used to trace the H2; the COS-B observations have sufficient resolution and sensitivity to constrain the relation between the integrated CO line intensity and the molecular hydrogen column density.

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