X-rays from Black Holes in Active Galaxies: The Great Escape

Details X-rays from Black Holes in Active Galaxies: The Great Escape X-rays from Black Holes in Active Galaxies: The Great Escape

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.3301n&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #33.01; Bulletin of the American Astronomical Society, Vol. 32, p.1448

Astronomy and Astrophysics

Astronomy

Scientific paper

Most candidate black holes are at the centers of active galaxies. The holes themselves are inherently dark, but a copious amount of radiation is generated when they accrete surrounding matter. Close to the event horizon, X-rays are produced in the accreting material that escape the gravitational pull. In the process, the black holes leave observable imprints on the spectrum. X-ray observations show evidence for matter orbiting with extremely high velocities, and the characteristic red-shift expected due to time dilation in the intense gravitational field. Current and future data can be used to help determine both the properties of the black holes, and the processes fueling galaxy activity.

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