X-rays and accretion discs as probes of the strong gravity of black holes

Details X-rays and accretion discs as probes of the strong gravity of black holes X-rays and accretion discs as probes of the strong gravity of black holes

2001-03-27

arxiv.org/abs/astro-ph/0103438v1

Astronomy and Astrophysics

Astrophysics

12 pages, 24 figures, Invited Talk at Texas Conference (Dec 2000, Austin Texas)

Scientific paper

10.1063/1.1419632

The observations and interpretation of broad iron lines in the X-ray spectra of Seyfert 1 galaxies are reviewed. The line profiles observed from MCG--6-30-15 and NGC 3516 show extended red wings to the line explained by large gravitational redshifts. The results are consistent with the emission expected from an X-ray irradiated flat accretion disc orbiting very close to a black hole. Results from XMM-Newton and Chandra are presented and the possibility of broad oxygen lines discussed.

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