SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM

	SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM
	Khan, Fazeel Mahmood 1,2,3; Holley-Bockelmann, Kelly 4,5; Berczik, Peter3,6,7 ; Just, Andreas 3
刊名	ASTROPHYSICAL JOURNAL
	2013-08-20
卷号	773 期号:2
关键词	black hole physics Galaxy: center galaxies: kinematics and dynamics
英文摘要	During a galaxy merger, the supermassive black hole (SMBH) in each galaxy is thought to sink to the center of the potential and form an SMBH binary; this binary can eject stars via three-body scattering, bringing the SMBHs ever closer. In a static spherical galaxy model, the binary stalls at a separation of about a parsec after ejecting all the stars in its loss cone-this is the well-known final parsec problem. Earlier work has shown that the centrophilic orbits in triaxial galaxy models are key in refilling the loss cone at a high enough rate to prevent the black holes from stalling. However, the evolution of binary SMBHs has never been explored in axisymmetric galaxies, so it is not clear if the final parsec problem persists in these systems. Here we use a suite of direct N-body simulations to follow SMBH binary evolution in galaxy models with a range of ellipticity. For the first time, we show that mere axisymmetry can solve the final parsec problem; we find the SMBH evolution is independent of N for an axis ratio of c/a = 0.8, and that the SMBH binary separation reaches the gravitational radiation regime for c/a = 0.75.
收录类别	SCI
语种	英语
WOS记录号	WOS:000323426100019
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5874]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Inst Space Technol, Dept Space Sci, Islamabad, Pakistan 2.Govt Coll Univ GCU, Dept Phys, Lahore 54000, Pakistan 3.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, D-69120 Heidelberg, Germany 4.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA 5.Fisk Univ, Dept Phys, Nashville, TN 37208 USA 6.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 7.Natl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Ukraine
推荐引用方式 GB/T 7714	Khan, Fazeel Mahmood,Holley-Bockelmann, Kelly,Berczik, Peter,et al. SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM[J]. ASTROPHYSICAL JOURNAL,2013,773(2).
APA	Khan, Fazeel Mahmood,Holley-Bockelmann, Kelly,Berczik, Peter,&Just, Andreas.(2013).SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM.ASTROPHYSICAL JOURNAL,773(2).
MLA	Khan, Fazeel Mahmood,et al."SUPERMASSIVE BLACK HOLE BINARY EVOLUTION IN AXISYMMETRIC GALAXIES: THE FINAL PARSEC PROBLEM IS NOT A PROBLEM".ASTROPHYSICAL JOURNAL 773.2(2013).