Accretion and jet power in active galactic nuclei

被引：38

作者：

Foschini, Luigi ^{[1
]}

机构：

[1] INAF Osservatorio Astron Brera, I-23807 Merate, LC, Italy

来源：

RESEARCH IN ASTRONOMY AND ASTROPHYSICS | 2011年 / 11卷 / 11期

基金：

美国国家航空航天局;

关键词：

galaxies: jets; BL Lacertae objects: general; quasars: general; galaxies: Seyfert; GAMMA-RAY CONNECTION; LINE SEYFERT 1; ELECTROMAGNETIC EXTRACTION; STATISTICAL-METHODS; ASTRONOMICAL DATA; RADIO GALAXIES; UPPER LIMITS; BLACK-HOLES; MODEL; ELECTRODYNAMICS;

D O I：

10.1088/1674-4527/11/11/003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The classical diagrams of radio loudness and jet power as a function of mass and accretion rate of the central spacetime singularity in active galactic nuclei are re-analyzed by including the data of the recently discovered powerful relativistic jets in Narrow-Line Seyfert 1 Galaxies. The results are studied in the light of the known theories of relativistic jets, indicating that, although the Blandford-Znajek mechanism is sufficient to explain the power radiated by BL Lac Objects, it fails to completely account for the power from quasars and Narrow-Line Seyfert 1 Galaxies. This favors the scenario outlined by Cavaliere & D'Elia of a composite jet, with a magnetospheric core plus a hydromagnetic component emerging when the accretion power increases and the disk becomes radiation-pressure dominated. A comparison with Galactic compact objects is also made, finding some striking similarities, indicating that since neutron stars are low-mass jet systems analogous to black holes, Narrow-Line Seyfert 1 Galaxies are low-mass counterparts of blazars.

引用

页码：1266 / 1278

页数：13

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