Observational evidence for a correlation between jet power and black hole spin

被引：180

作者：

Narayan, Ramesh ^{[1
]}

McClintock, Jeffrey E. ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 419卷 / 01期

关键词：

accretion; accretion discs; black hole physics; binaries: close; ISM: jets and outflows; X-rays: binaries; CONTINUUM-FITTING METHOD; X-RAY-SPECTRA; ELECTROMAGNETIC EXTRACTION; RELATIVISTIC JETS; ACCRETION DISKS; RADIO-EMISSION; XTE J1550-564; EJECTION; ENERGY; MODEL;

D O I：

10.1111/j.1745-3933.2011.01181.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the 5-GHz radio flux of transient ballistic jets in black hole binaries correlates with the dimensionless black hole spin parameter a* estimated via the continuum-fitting method. The data suggest that jet power scales either as the square of a* or as the square of the angular velocity of the horizon OH. This is the first direct evidence that jets may be powered by black hole spin energy. The observed correlation validates the continuum-fitting method of measuring spin. In addition, for those black holes that have well-sampled radio observations of ballistic jets, the correlation may be used to obtain rough estimates of their spins.

引用

页码：L69 / L73

页数：5

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