Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-12-10
Mon.Not.Roy.Astron.Soc. 303 (1999) L11
Astronomy and Astrophysics
Astrophysics
6 pages, 2 postscript figures, LaTeX, MNRAS, in press (1999)
Scientific paper
10.1046/j.1365-8711.1999.02343.x
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 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 ones with hard spectra. We find that at a given spectral slope, black-hole binaries have similar 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.
Lubiski P.
Smith Alastair D.
Zdziarski Andrzej A.
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