Gamma-rays and the Interstellar Medium

Details Gamma-rays and the Interstellar Medium Gamma-rays and the Interstellar Medium

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.4305k&link_type=abstract

American Astronomical Society, 188th AAS Meeting, #43.05; Bulletin of the American Astronomical Society, Vol. 28, p.889

Astronomy and Astrophysics

Astronomy

Scientific paper

Regions of high gamma-ray emissivity are spatially correlated with regions where the 0.25 keV x-ray background is bright. This strongly suggests a common origin. Here, we further analyse the correlation between soft x-rays and gamma-ray emissivity, defined as the gamma-ray intensity divided by the gas column density along each line of sight. We use information from soft x-ray shadowing measurements to constrain the geometry of gamma-ray emission. Interpreting the enhanced gamma-ray emissivity as due to a local concentration of cosmic rays, we discuss possible acceleration mechanisms. We also discuss implications of these results for models of the soft x-ray background and the EUV and soft x-ray spectra of the background.

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