Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-11-07
Astrophys.SpaceSci.309:271-275,2007
Astronomy and Astrophysics
Astrophysics
4 pages, based on presentation at "The multimessenger approach to unidentified gamma-ray sources", Barcelona/Spain, July 2006;
Scientific paper
10.1007/s10509-007-9467-y
Supermassive binary black holes (SBBHs) are a natural outcome of galaxy mergers. Here we show that low-frequency ($f \leq 10^{-6}$ Hz) quasi-periodic variability observed from cosmic blazar sources can provide substantial inductive support for the presence of close ($d \lppr 0.1$ pc) SBBHs at their centers. It is argued on physical grounds that such close binary systems are likely to give rise to different (although not independent) periodicities in the radio, optical and X-ray/TeV regime, and, hence that detection of appropriate period ratios significantly corroborates the SBBH interpretation. This is illustrated for a binary model where optical longterm periodicity is related to accretion disk interactions, radio periodicity to Newtonian jet precession, and periodicities in the high energy bands to the orbital motion of the jet. We use the observed periodicities to constrain the properties for a sample of SBBH candidates including OJ 287 and AO 0235+16, and discuss the results within the context of jet activity and binary evolution.
No associations
LandOfFree
Supermassive binary black holes among cosmic gamma-ray sources 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 Supermassive binary black holes among cosmic gamma-ray sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Supermassive binary black holes among cosmic gamma-ray sources will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-617049