Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.239..149m&link_type=abstract
In ESA Proceedings of ESA Workshop on a Cosmic X-Ray Spectroscopy Mission p 149-154 (SEE N86-22461 12-89)
Astronomy and Astrophysics
Astronomy
Cosmic X Rays, Iron, Pulsars, Spaceborne Astronomy, X Ray Binaries, X Ray Fluorescence, X Ray Spectra, Astronomical Models, High Temperature Plasmas, Seyfert Galaxies
Scientific paper
Gas scintillation proportional counters on board Tenma have detected iron K X-rays at an energy of 6.4 keV from some binary X-ray pulsars. This is satisfactorily explained by a picture in which continuum X-rays originating from a compact region excite fluorescent K X-rays in the surrounding cold matter. Intense K X-rays at 6.4 keV have also been detected from the Seyfert galaxy NGC 4151. The emission line at an energy of 6.7 keV is observed from non-pulsating low mass X-ray binaries and Cyg X-3. This is also probably explained by fluorescent mechanism in a hot gas region. On the other hand intense 6.7 keV lines are detected from supernova remnants, clusters of galaxies and the galactic ridge on the plane. Various emission lines as well as the 6.7 keV lines are produced from hot plasma region in these sources.
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