The Stellar Orbital Structure in Axisymmetric Galaxy Models with Supermassive Black Hole Binaries

doi:10.3847/1538-4357/aae9e0

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	The Stellar Orbital Structure in Axisymmetric Galaxy Models with Supermassive Black Hole Binaries
	Li, Baile 2; Holley-Bockelmann, Kelly 1,3; Khan, Fazeel Mahmood 4
刊名	ASTROPHYSICAL JOURNAL
	2018-12-10
卷号	869 期号:1 页码:7
关键词	black hole physics galaxies: elliptical and lenticular, cD galaxies: kinematics and dynamics galaxies: nuclei galaxies: structure
ISSN号	0004-637X
DOI	10.3847/1538-4357/aae9e0
英文摘要	It has been well established that particular centrophilic orbital families in non-spherical galaxies can, in principle, drive a black hole binary to shrink its orbit through three-body scattering until the black holes are close enough to strongly emit gravitational waves. Most of these studies rely on the orbital analysis of a static supermassive black hole (SMBH)-embedded galaxy potential to support this view; it is not clear, however, how these orbits transform as the second SMBH enters the center. So our understanding of which orbits actually interact with an SMBH binary is not ironclad. Here, we analyze two flattened galaxy models, one with a single SMBH and one with a binary, to determine which orbits actually do interact with the SMBH binary and how they compare with the set predicted in single SMBH-embedded models. We find close correspondence between the centrophilic orbits predicted to interact with the binary and those that are actually scattered by the binary, in terms of energy and L-z distribution, where L-z is the z component of a stellar particle's angular momentum. Of minor note: because of the larger mass, the binary SMBH has a larger radius of influence than in the single SMBH model, which allows the binary to draw from a larger reservoir of orbits to scatter. Of the prediction particles and scattered particles, nearly half have chaotic orbits, 40% have f(x):f(y) = 1:1 orbits and 10% have other resonant orbits.
资助项目	Office of China Postdoctoral Council
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000452386600007
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32045]
专题	中国科学院上海天文台
通讯作者	Li, Baile
作者单位	1.Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Fisk Univ, Dept Phys, Nashville, TN 37208 USA 4.Inst Space Technol, Dept Space Sci, POB 2750, Islamabad, Pakistan
推荐引用方式 GB/T 7714	Li, Baile,Holley-Bockelmann, Kelly,Khan, Fazeel Mahmood. The Stellar Orbital Structure in Axisymmetric Galaxy Models with Supermassive Black Hole Binaries[J]. ASTROPHYSICAL JOURNAL,2018,869(1):7.
APA	Li, Baile,Holley-Bockelmann, Kelly,&Khan, Fazeel Mahmood.(2018).The Stellar Orbital Structure in Axisymmetric Galaxy Models with Supermassive Black Hole Binaries.ASTROPHYSICAL JOURNAL,869(1),7.
MLA	Li, Baile,et al."The Stellar Orbital Structure in Axisymmetric Galaxy Models with Supermassive Black Hole Binaries".ASTROPHYSICAL JOURNAL 869.1(2018):7.