NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T07:55:37 PDT
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For refcode 1999MNRAS.303L..11Z:
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NED Abstract

Copyright by Royal Astronomical Society. 1999MNRAS.303L..11Z between Compton reflection and X-ray slope in Seyferts and X- ray binaries Andrzej A. Zdziarski, Piotr Lubinski, David A.Smith Accepted 1998 December 2. Received 1998 December 2;in original form 1998 October 5 ABSTRACT We find a very strong correlation between the intrinsic spectral slope in X-rays and the amount of Compton reflection from a cold medium in Seyfert AGNs and in the hard state of X-ray binaries with either black holes or weakly magnetized neutron stars. Objects with soft intrinsic spectra show much stronger reflection than those with hard spectra. We find that, at a given spectral slope, black hole binaries have similar reflection to or more reflection than Seyferts, whereas neutron star binaries in our sample have reflection consistent with that in Seyferts. The existence of the correlation implies a dominant role of the reflecting medium as a source of seed soft photons for thermal Comptonization in the primary X-ray source. Key words: accretion, accretion discs - radiation mechanisms: thermal - binaries: general - galaxies: Seyfert - X-rays: stars
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