2001A&A...377...17Y


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.21CEST16:04:36

2001A&A...377...17Y - Astronomy and Astrophysics, volume 377, 17-22 (2001/10-1)

Fe Kα line: A tool to probe massive binary black holes in Active Galactic Nuclei?

YU Q.-J. and LU Y.-J.

Abstract (from CDS):

Since many or most galaxies have central massive black holes (BHs), mergers of galaxies can form massive binary black holes (BBHs). It is possible that some BBHs exist in active galactic nuclei (AGNs). We argue that each BH may be surrounded by an accretion disc with a different inclination angle to the line of sight (due to different BH spin directions and the Bardeen-Petterson effect). The observed Fe Kα line profile from a BBH system is a combination of the lines from the inner regions of the two discs, which is significantly affected by the inclination angles of the two discs. The Fe Kα line profile associated with BBHs may have an unusual shape with double or more peaks as well as short-term variability (e.g. ∼104s), which can be distinguished from the Fe Kα line properties of some other possible models. The precession of the two discs could introduce two un-related quasi-periodic signals in the X-ray continuum emission, which would be useful to constrain both of the BH masses. We suggest that with the improvement of resolution in X-ray astronomy, Fe Kα line profiles be a potential tool to probe the existence of massive BBHs in AGNs. The Fe Kα line profile associated with BBHs may also provide a tool to investigate the dynamics in strong gravitation field (e.g. providing evidence of the Bardeen-Petterson effect).

Abstract Copyright:

Journal keyword(s): black hole physics - accretion - line profile - galaxies: active

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 1937 1
2 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3293 2
3 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 909 1
4 Mrk 205 Sy1 12 21 44.0723278508 +75 18 38.242986688   15.64 15.24 14.7   ~ 444 0
5 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1358 0
6 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1870 2
7 FRL 49 Sy2 18 36 58.2344504326 -59 24 08.288330694   11.1   14.19   ~ 201 0

    Equat.    Gal    SGal    Ecl

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2019.09.21-16:04:36

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