@inproceedings{oai:jaxa.repo.nii.ac.jp:00005279,
 author = {早崎, 公威 and 磯部, 直樹 and 須藤, 広志 and 嶺重, 慎 and Hayasaki, Kimitake and Isobe, Naoki and Sudou, Hiroshi and Seta, Hiromi and Mineshige, Shin},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop},
 month = {Feb},
 note = {Astrophysics with All-Sky X-Ray observations: 3rd International MAXI Workshop (RIKEN, 10-12 June 2008), Supermassive black holes are considered to have been coevolved with their host galaxies. This strongly suggests that black hole growth is mainly caused by black hole mergers and subsequent accretion of gas in the course of the galaxy merger. If so, a supermassive binary black hole with a sub-parsec scale separation are inevitably formed before the black holes merge by emitting gravitational radiation. However, there is yet no definitive observational evidence for the supermassive binary black hole in spite of some claims (e.g. quasi-periodic light variations from OJ287). In this paper, we study the smoothed particle hydrodynamics simulations of accretion flows around the sub-parsec scale binary black hole with a moderate orbital eccentricity. In the simulations we consider a triple-disk system composing of two accretion disks around black holes and one circumbinary disk surrounding the two. Here, the circumbinary disk works as a mass reservoir. We confirm that X-ray luminosity from accretion disks significantly depends on the orbital phase because of the eccentric orbit of the binary black hole. Note also that the X-ray luminosity exhibits the double peaks every binary orbit in the case of binary black hole with low mass ratios. Such properties could not only explain a basic feature of light variations from OJ287 but also provide a potentially important observational signature of the sub-parsec binary black hole in active galactic nuclei with MAXI., Physical characteristics: Original contains color illustrations, 資料番号: AA0064306040, レポート番号: JAXA-SP-08-014E},
 pages = {202--205},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {Probing a supermassive binary black hole with MAXI},
 volume = {JAXA-SP-08-014E},
 year = {2009}
}