Relativistic Flows in Astrophysics (Hardcover, 2002 ed.)

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 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.

General

Imprint:	Springer-Verlag
Country of origin:	Germany
Series:	Lecture Notes in Physics, 589
Release date:	July 2002
First published:	2002
Editors:	A.W. Guthmann • M. Georganopoulos • A. Marcowith • K. Manolakou
Dimensions:	234 x 156 x 15mm (L x W x T)
Format:	Hardcover
Pages:	246
Edition:	2002 ed.
ISBN-13:	978-3-540-43518-1
Categories:	Books > Science & Mathematics > Physics > Applied physics & special topics > Astrophysics Promotions
LSN:	3-540-43518-2
Barcode:	9783540435181

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