The center of the Galaxy in the recent past - A view from GRANAT

Details The center of the Galaxy in the recent past - A view from GRANAT The center of the Galaxy in the recent past - A view from GRANAT

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...407..606s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 407, no. 2, p. 606-610.

Astronomy and Astrophysics

Astronomy

94

Galactic Nuclei, Interstellar Gas, Milky Way Galaxy, Spaceborne Astronomy, Astronomical Spectroscopy, Bremsstrahlung, Emission Spectra, Energy Bands, Molecular Gases, X Ray Spectra

Scientific paper

The Galactic center was observed with ART-P telescope to obtain 15 arcmin resolution images of the extended source in several energy bands, including the energies from 8-22 keV. At high energies the emission appear to be more elongated parallel to the Galactic plane and has certain features in common with the map of molecular gas clouds. It is suggested that the high energy portion of the flux arises from Thomson scattering by dense molecular gas of the X-rays from nearby compact sources. The scattered X-ray flux from such gas, which resides in this region, illuminated by the presently observed nearby X-ray sources, is expected to be more than 0.1 of the observed hard X-ray flux from the diffuse source, the uncertainty arising mainly from contradictory estimates of the molecular gas mass.

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