The 6.7 keV iron line distribution in the Galaxy

Details The 6.7 keV iron line distribution in the Galaxy The 6.7 keV iron line distribution in the Galaxy

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404..620y&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 2, p. 620-624.

Astronomy and Astrophysics

Astronomy

69

Emission Spectra, Iron, Line Spectra, Milky Way Galaxy, X Ray Astronomy, X Ray Spectra, Diffuse Radiation, Galactic Bulge, Ginga Satellite, Luminosity

Scientific paper

We have systematically observed the 6.7 keV iron line emission from the Galactic ridge with the X-ray satellite Ginga. The volume emissivity of the iron line emission from the Galactic ridge is approximated by an exponential disk model plus an arm component of Galactic radius 4 kpc. The scale height of the Galactic ridge emission is determined to be 100 +/- 20 pc. The iron line luminosity from the Galactic ridge is estimated to be (6.5 +/- 1.3) x 10 exp 36 ergs/s, which is about 7 percent of the 2-10 keV band luminosity. We have also discovered another diffuse emission feature near the Galactic bulge with luminosity of about (2.8 +/- 0.8) x 10 exp 36 ergs/s. This emission is found to be extended to a higher Galactic latitude of more than 5 deg.

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