Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198...11s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 198, Jan. 1982, p. 11-21.
Astronomy and Astrophysics
Astronomy
7
Galactic Radiation, Gamma Rays, Milky Way Galaxy, Pulsars, Astronomical Catalogs, Emission Spectra, Radiant Flux Density
Scientific paper
The components from which the gamma-ray luminosity of the Galaxy is known to arise are grouped into three classes. A relative contribution greater than about 34% belongs to the strong, discrete sources defined by the acceptance criteria of the 2CG catalogue. Although these are mostly unidentified, the population-type information derivable from evolution constraints and the observed galactocentric radius justifies this estimate. A class contribution of about 20% is derived from radio data for the case of normal radio pulsars, and the remainder of the gamma-ray luminosity is attributed to cosmic ray interactions with the diffuse matter. No evidence is found for a positive correlation of cosmic ray and gas densities. Instead, the large gamma-ray luminosity contributed by a Population I component explains the gamma-ray background longitude profile for which the correlation hypothesis was advanced.
Massaro Enrico
Salvati Marco
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