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Dynamical Evolution and Merger Timescales of LISA Massive Black Hole Binaries in Disk Galaxy Mergers

文献类型：期刊论文

作者Khan, Fazeel M.5; Capelo, Pedro R.1; Mayer, Lucio1; Berczik, Peter2,3,4,6
刊名ASTROPHYSICAL JOURNAL
出版日期2018-12-01
卷号868期号:2页码:11
关键词black hole physics galaxies: interactions galaxies: kinematics and dynamics galaxies: nuclei gravitational waves methods: numerical
ISSN号0004-637X
DOI10.3847/1538-4357/aae77b
英文摘要The Laser Interferometer Space Antenna (LISA) will detect gravitational-wave (GW) signals from merging supermassive black holes (BHs) with masses below 10(7) M-circle dot. It is thus of paramount importance to understand the orbital dynamics of these relatively light central BHs, which typically reside in disk-dominated galaxies, in order to produce reliable forecasts of merger rates. To this aim, realistic simulations probing BH dynamics in unequal-mass disk galaxy mergers, into and beyond the binary hardening stage, are performed by combining smooth particle hydrodynamics and direct N-body codes. The structural properties and orbits of the galaxies are chosen to be consistent with the results of galaxy formation simulations. Stellar and dark matter distributions are triaxial down to the central 100 pc of the merger remnant. In all cases, a BH binary forms and hardens on timescales of at most 100 Myr, coalescing on another few-hundred-megayear timescale, depending on the characteristic density and orbital eccentricity. Overall, the sinking of the BH binary takes no more than similar to 0.5 Gyr after the merger of the two galaxies is completed, but it can be much faster for very plunging orbits. Comparing with previous numerical simulations following the decay of BHs in massive early-type galaxies at z similar to 3, we confirm that the characteristic density is the most crucial parameter determining the overall BH merging timescale, despite the structural diversity of the host galaxies. Our results lay down the basis for robust forecasts of LISA event rates in the case of merging BHs.
WOS关键词ACTIVE GALACTIC NUCLEI ; ORBITAL PARAMETERS ; ANGULAR-MOMENTUM ; DWARF GALAXIES ; HIGH-REDSHIFT ; I. ; HISTORIES ; BULGES ; GAS
资助项目Higher Education Commission of Pakistan through NRPU[4159] ; Tomalla Foundation ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; National Science Foundation of China[11673032] ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences[XDB23040100] ; Center of Information and Computing of NAOC ; Volkswagen Foundation under the Trilateral Partnerships grant[90411] ; International Space Science Institute, Bern, Switzerland[393] ; Chinese Academy of Sciences through the "Qianren" special foreign experts program
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000451432300010
出版者IOP PUBLISHING LTD
资助机构Higher Education Commission of Pakistan through NRPU ; Higher Education Commission of Pakistan through NRPU ; Tomalla Foundation ; Tomalla Foundation ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; National Science Foundation of China ; National Science Foundation of China ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Center of Information and Computing of NAOC ; Center of Information and Computing of NAOC ; Volkswagen Foundation under the Trilateral Partnerships grant ; Volkswagen Foundation under the Trilateral Partnerships grant ; International Space Science Institute, Bern, Switzerland ; International Space Science Institute, Bern, Switzerland ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Higher Education Commission of Pakistan through NRPU ; Higher Education Commission of Pakistan through NRPU ; Tomalla Foundation ; Tomalla Foundation ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; National Science Foundation of China ; National Science Foundation of China ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Center of Information and Computing of NAOC ; Center of Information and Computing of NAOC ; Volkswagen Foundation under the Trilateral Partnerships grant ; Volkswagen Foundation under the Trilateral Partnerships grant ; International Space Science Institute, Bern, Switzerland ; International Space Science Institute, Bern, Switzerland ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Higher Education Commission of Pakistan through NRPU ; Higher Education Commission of Pakistan through NRPU ; Tomalla Foundation ; Tomalla Foundation ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; National Science Foundation of China ; National Science Foundation of China ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Center of Information and Computing of NAOC ; Center of Information and Computing of NAOC ; Volkswagen Foundation under the Trilateral Partnerships grant ; Volkswagen Foundation under the Trilateral Partnerships grant ; International Space Science Institute, Bern, Switzerland ; International Space Science Institute, Bern, Switzerland ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Higher Education Commission of Pakistan through NRPU ; Higher Education Commission of Pakistan through NRPU ; Tomalla Foundation ; Tomalla Foundation ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the Silk Road Project at NAOC ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; Chinese Academy of Sciences through the President's International Fellowship for Visiting Scientists program of CAS ; National Science Foundation of China ; National Science Foundation of China ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Strategic Priority Research Program (Pilot B) "Multiwavelength gravitational wave universe" of the Chinese Academy of Sciences ; Center of Information and Computing of NAOC ; Center of Information and Computing of NAOC ; Volkswagen Foundation under the Trilateral Partnerships grant ; Volkswagen Foundation under the Trilateral Partnerships grant ; International Space Science Institute, Bern, Switzerland ; International Space Science Institute, Bern, Switzerland ; Chinese Academy of Sciences through the "Qianren" special foreign experts program ; Chinese Academy of Sciences through the "Qianren" special foreign experts program
源URL[http://ir.bao.ac.cn/handle/114a11/23642]  
专题中国科学院国家天文台
通讯作者Khan, Fazeel M.
作者单位1.Univ Zurich, Ctr Theoret Astrophys & Cosmol, Inst Computat Sci, Winterthurerstr 190, CH-8057 Zurich, Switzerland
2.Chinese Acad Sci, Natl Astron Observ China, 20A Datun Rd, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China
4.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany
5.Inst Space Technol, Dept Space Sci, POB 2750, Islamabad 44000, Pakistan
6.Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03680 Kiev, Ukraine
推荐引用方式
GB/T 7714		 Khan, Fazeel M.,Capelo, Pedro R.,Mayer, Lucio,et al. Dynamical Evolution and Merger Timescales of LISA Massive Black Hole Binaries in Disk Galaxy Mergers[J]. ASTROPHYSICAL JOURNAL,2018,868(2):11.
APA Khan, Fazeel M.,Capelo, Pedro R.,Mayer, Lucio,&Berczik, Peter.(2018).Dynamical Evolution and Merger Timescales of LISA Massive Black Hole Binaries in Disk Galaxy Mergers.ASTROPHYSICAL JOURNAL,868(2),11.
MLA Khan, Fazeel M.,et al."Dynamical Evolution and Merger Timescales of LISA Massive Black Hole Binaries in Disk Galaxy Mergers".ASTROPHYSICAL JOURNAL 868.2(2018):11.

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