Relativistic Flows in Astrophysics A.W. Guthmann

ISBN: 9783642078040

Published: December 4th 2010

Paperback

246 pages


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Relativistic Flows in Astrophysics  by  A.W. Guthmann

Relativistic Flows in Astrophysics by A.W. Guthmann
December 4th 2010 | Paperback | PDF, EPUB, FB2, DjVu, AUDIO, mp3, RTF | 246 pages | ISBN: 9783642078040 | 3.35 Mb

1. 1 Schematic Picture of AGN Some galaxies are known to emit radiation with extremely high luminosities from a rather small volume in the ray, X-ray and UV continuum. Such active cores are the so-called Active Galactic Nuclei (AGN) and the radiationMore1. 1 Schematic Picture of AGN Some galaxies are known to emit radiation with extremely high luminosities from a rather small volume in the ray, X-ray and UV continuum.

Such active cores are the so-called Active Galactic Nuclei (AGN) and the radiation is commonly believed to be a result of gravitational energy released by matter spiraling around 9 a supermassive central black hole of about 10 M (see Fig.

1). Though the central engine which produces the enormous observed activity cannot be resolved observationally, a standard picture of an AGN has gradually emerged to explain the richness of the radiation spectra: an accretion disk with radius from about 2 to 100 gravitational radii, R, g feeding the central black hole and emitting mainly in the UV and soft X-rays- the broad line optically emitting clouds (BLR), which seem to be absent in 3 some sources (e.

g. FRI, see hereafter) and extend up to a few 10 R from g the center.



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