Double-double radio galaxies: remnants of merger of supermassive binary black holes

Details Double-double radio galaxies: remnants of merger of supermassive binary black holes Double-double radio galaxies: remnants of merger of supermassive binary black holes

2003-10-02

arxiv.org/abs/astro-ph/0310045v1

Mon.Not.Roy.Astron.Soc.340:411,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 2 figures

Scientific paper

10.1046/j.1365-8711.2003.06235.x

The activity of active galaxy may be triggered by the merge of galaxies and present-day galaxies are probably the product of successive minor mergers. The frequent galactic merges at high redshift imply that active galaxy harbors supermassive unequal-mass binary black holes in its center at least once during its life time. In this paper, we showed that the recently discovered double-lobed FR II radio galaxies are the remnants of such supermassive binary black holes. The inspiraling secondary black hole opens a gap in the accretion disk and removes the inner accretion disk when it merges into the primary black hole, leaving a big hole of about several hundreds of Schwarzschild radius in the vicinity of the post-merged supermassive black hole and leading to an interruption of jet formation. When the outer accretion disk slowly refills the big hole on a viscous time scale, the jet formation restarts and the interaction of the recurrent jets and the inter-galactic medium forms a secondary pair of lobes. We applied the model to a particular double-lobed radio source B1834+620 and showed that the orbit of the secondary is elliptical with a typical eccentricity $e \simeq 0.68$ and the mass ratio $q$ of the secondary and the primary is $0.01 \la q \la 0.4$. The accretion disk is a standard $\alpha$-disk with $0.01 \la \alpha \la 0.04$ and the ratio of disk half height $H$ and radius $r$ is $\delta \simeq 0.01$. The model predicates that double-lobed radio structure forms only in FR II radio galaxies.

Affiliated with

Also associated with

No associations

Rating

Double-double radio galaxies: remnants of merger of supermassive binary black holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Double-double radio galaxies: remnants of merger of supermassive binary black holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double-double radio galaxies: remnants of merger of supermassive binary black holes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-211610