SWIFT COALESCENCE OF SUPERMASSIVE BLACK HOLES IN COSMOLOGICAL MERGERS OF MASSIVE GALAXIES

	SWIFT COALESCENCE OF SUPERMASSIVE BLACK HOLES IN COSMOLOGICAL MERGERS OF MASSIVE GALAXIES
	Khan, Fazeel Mahmood 1; Fiacconi, Davide 2; Mayer, Lucio 2; Berczik, Peter3,4,5,6 ; Just, Andreas 5
刊名	ASTROPHYSICAL JOURNAL
	2016-09-10
卷号	828 期号:2
关键词	black hole physics galaxies: interactions galaxies: kinematics and dynamics galaxies: nuclei gravitational waves methods: numerical
英文摘要	Supermassive black holes (SMBHs) are ubiquitous in galaxies with a sizable mass. It is expected that a pair of SMBHs originally in the nuclei of two merging galaxies would form a binary and eventually coalesce via a burst of gravitational waves. So far, theoretical models and simulations, focusing only on limited phases of the orbital decay of SMBHs under idealized conditions of the galaxy hosts, have been unable to directly predict the SMBH merger timescale from ab-initio galaxy formation theory. The predicted SMBH merger timescales are long, of order Gyrs, which could be problematic for future gravitational wave (GW) searches. Here, we present the first multi-scale Lambda CDM cosmological simulation that follows the orbital decay of a pair of SMBHs in a merger of two typical massive galaxies at z similar to 3, all the way to the final coalescence driven by GW emission. The two SMBHs, with masses similar to 10(8) M-circle dot, settle quickly in the nucleus of the merger remnant. The remnant is triaxial and extremely dense due to the dissipative nature of the merger and the intrinsic compactness of galaxies at high redshift. Such properties naturally allow a very efficient hardening of the SMBH binary. The SMBH merger occurs in only similar to 10 Myr after the galactic cores have merged, which is two orders of magnitude smaller than the Hubble time.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	ACTIVE GALACTIC NUCLEI ; FINAL-PARSEC PROBLEM ; SIMILAR-TO 2 ; HOST GALAXIES ; SCALING RELATIONS ; BINARY EVOLUTION ; GRAVITATIONAL-RADIATION ; EFFICIENT MERGER ; ORBITAL DECAY ; HIGH-REDSHIFT
收录类别	SCI
语种	英语
WOS记录号	WOS:000405198400002
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/8821]
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, POB 2750, Islamabad, Pakistan 2.Univ Zurich, Inst Computat Sci, Ctr Theoret Astrophys & Cosmol, Winterthurerstr 190, CH-8057 Zurich, Switzerland 3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 5.Heidelberg Univ, Astron Rechen Inst, Zentrum Astron, Monchhofstr 12-14, D-69120 Heidelberg, Germany 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 Mahmood,Fiacconi, Davide,Mayer, Lucio,et al. SWIFT COALESCENCE OF SUPERMASSIVE BLACK HOLES IN COSMOLOGICAL MERGERS OF MASSIVE GALAXIES[J]. ASTROPHYSICAL JOURNAL,2016,828(2).
APA	Khan, Fazeel Mahmood,Fiacconi, Davide,Mayer, Lucio,Berczik, Peter,&Just, Andreas.(2016).SWIFT COALESCENCE OF SUPERMASSIVE BLACK HOLES IN COSMOLOGICAL MERGERS OF MASSIVE GALAXIES.ASTROPHYSICAL JOURNAL,828(2).
MLA	Khan, Fazeel Mahmood,et al."SWIFT COALESCENCE OF SUPERMASSIVE BLACK HOLES IN COSMOLOGICAL MERGERS OF MASSIVE GALAXIES".ASTROPHYSICAL JOURNAL 828.2(2016).