Query : 2003A&A...412L..61K

2003A&A...412L..61K - Astronomy and Astrophysics, volume 412, L61-64 (2003/12-4)

Spin orientation of supermassive black holes in active galaxies.


Abstract (from CDS):

Accretion of gas onto a central supermassive black hole is generally accepted to be the source of the emitted energy in active galactic nuclei. The broad emission lines we observe in their optical spectra are probably formed in the wind of an accretion disk at distances of light days to light years from the central black hole. The variable fraction of the emission lines originates at typical distances of only 1 to 50 light days from the central supermassive black hole. We derived a central black hole mass of Morbital=1.8±0.4x107M in the Seyfert galaxy Mrk 110 assuming the broad emission lines are generated in gas clouds orbiting within an accretion disk. This figure depends on the inclination angle of the accretion disk. Here we report on the detection of gravitational redshifted emission in the variable fraction of the broad emission lines. We derive a central black hole mass of Mgrav=14.0±3.0x107M. These measurements are independent on the orientation of the accretion disk. The comparison of both black hole mass estimates allows to determine the projection of the central accretion disk angle i to 21±5° in Mrk 110 and therefore the orientation of the spin axis of the central black hole.

Abstract Copyright:

Journal keyword(s): accretion disks - black hole physics - gravitation - line: profiles - galaxies: active - galaxies: individual: Mrk 110

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 580 0
2 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1055 0

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