Other
Scientific paper
Dec 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.6201f&link_type=abstract
American Astronomical Society, 187th AAS Meeting, #62.01; Bulletin of the American Astronomical Society, Vol. 27, p.1372
Other
Scientific paper
Seyfert galaxies commonly show Fe-K line emission. X-ray spectra from ASCA now enable the line to be resolved. In Seyfert 1 galaxies the line is often found to be broad, and in the best observed cases is skew, with a sharp drop at the higher energies (\sim 6.5 - 7 keV) and a long tail to lower energies (4 - 5 keV). The line is best modeled by fluorescence from the innermost regions (less than about 20 Schwarzschild radii) of an accretion disk about a massive black hole. The profile and time variation of the iron line in MCG-6-30-15$ will be discussed, together with results from some other Seyfert 1 galaxies. Additional emission from outer gas in both Seyfert 1 and 2 galaxies is used to constrain the overall geometry. Finally, the prospects for understanding the near environment of black holes through iron-line spectroscopy will be outlined.
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