Statistics – Computation
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...292...82s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 292, no. 1, p. 82-91
Statistics
Computation
51
Computational Astrophysics, Continuums, Cosmic Rays, Emission, Galactic Halos, Galaxies, Gamma Rays, Interstellar Gas, Plasma Clouds, Point Sources, Spectrum Analysis, Astronomical Models, Bremsstrahlung, Correlation, Emission Spectra, Gamma Ray Observatory, Hydrogen, Sky Surveys (Astronomy)
Scientific paper
The diffuse Galactic continuum gamma-ray emission has been studied using the full Sky Survey from COMPTEL on the Compton Observatory CGRO. The diffuse emission appears to be visible in the whole 0.75-30 MeV range covered by the instrument, although a considerable contribution from unresolved point sources cannot be excluded. A correlation analysis using HI and CO surveys of the Galaxy is used to derive the Galactic emissivity spectrum, and this is consistent with a smooth continuation to the spectrum at higher energies derived by a similar analysis of COS-B data. The apparent conversion factor from integrated CO temperature to molecular hydrogen column density can also be determined from the correlation analysis. The value obtained is consistent with results from COS-B and other non-gamma-ray methods. Calculations of the emissivity spectrum from bremsstrahlung from a cosmic-ray electron spectrum based on propagation models are compared with the observations.
Bennett Kevin
Bloemen Hans
de Vries Chris
Diehl Roland
Hermsen Willem
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