Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures

doi:10.1093/mnras/sty1105

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	Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures
	Maureira-Fredes, Cristian 1; Goicovic, Felipe G.2,3; Amaro-Seoane, Pau 4,5,6,7,8; Sesana, Alberto 9,10
	2018-08-01
发表期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
卷号	478 期号:2 页码:1726-1748
摘要	Massive black hole binaries (MBHBs) represent an unavoidable outcome of hierarchical galaxy formation, but their dynamical evolution at subparsec scales is poorly understood. In gas-rich environments, an extended, steady circumbinary gaseous disc could play an important role in the MBHB evolution, facilitating its coalescence. However, it is unclear how gas on galactic scales is transported to the nuclear region to form and maintain such a stable structure. In the aftermath of a galaxy merger, cold turbulent gas condenses into clumps and filaments that can be randomly scattered towards the nucleus. This provides a natural way of feeding the binary with intermittent pockets of gas. The aim of this work is to investigate the gaseous structures arising from this interaction. We employ a suite of smoothed-particle-hydrodynamic simulations to study the influence of the infall rate and angular momentum distribution of the incoming clouds on the formation and evolution of structures around theMBHB. We find that there are positive and negative effects of the continuous supply of discrete clouds, resulting in intermittent formation and disruption of circumbinary structures. Anisotropic cloud distributions featuring an excess of corotating events generate more prominent corotating circumbinary discs. Similar structures are seen when mostly counter-rotating clouds are fed to the binary, even though they are more compact and less stable. In general, our simulations do not show the formation of extended smooth and stable circumbinary discs, typically assumed in analytical and numerical investigations of the the long-term evolution of MBHBs.
关键词	accretion, accretion discs hydrodynamics galaxies: evolution galaxies: nuclei
DOI	10.1093/mnras/sty1105
语种	英语
资助项目	Transregio 7 'Gravitational Wave Astronomy' - Deutsche Forschungsgemeinschaft DFG (German Research Foundation) ; DFG Project 'Supermassive black holes, accretion discs, stellar dynamics and tidal disruptions' ; International Max-Planck Research School ; CONICYT-PCHA Doctorado Nacional scholarship ; DAAD ; ERC-StG[EXAGAL-308037] ; Klaus Tschira Foundation ; Royal Society ; Ministry of Economy, Industry and Competitiveness of Spain ; COST Action GW-verse[CA16104] ; CAS President's International Fellowship Initiative
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
WOS记录号	WOS:000439547400021
出版者	OXFORD UNIV PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/30789
专题	中国科学院数学与系统科学研究院
通讯作者	Maureira-Fredes, Cristian; Goicovic, Felipe G.
作者单位	1.Max Planck Inst Gravitat Phys, Albert Einstein Inst, Mulenberg 1, D-14476 Potsdam, Germany 2.HITS, Schloss Wolfsbrunnenweg 35, D-69118 Heidelberg, Germany 3.Pontificia Univ Catolica Chile, Inst Astroffs, Av Vicuna Mackenna 4860, Santiago 7820436, Chile 4.CSIC, Inst Space Sci, ICE, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain 5.IEEC, Campus UAB,Carrer Can Magrans S-N, E-08193 Barcelona, Spain 6.Chinese Acad Sci, Acad Math & Syst Sci, Inst Appl Math, Beijing 100190, Peoples R China 7.Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 8.TU Berlin, Zentrum Astron & Astrophys, Hardenbergstr 36, D-10623 Berlin, Germany 9.Univ Birmingham, Sch Phys & Astron, Edgbaston B15 2TT, England 10.Univ Birmingham, Inst Gravitat Wave Astron, Edgbaston B15 2TT, England
推荐引用方式 GB/T 7714	Maureira-Fredes, Cristian,Goicovic, Felipe G.,Amaro-Seoane, Pau,et al. Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,478(2):1726-1748.
APA	Maureira-Fredes, Cristian,Goicovic, Felipe G.,Amaro-Seoane, Pau,&Sesana, Alberto.(2018).Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,478(2),1726-1748.
MLA	Maureira-Fredes, Cristian,et al."Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 478.2(2018):1726-1748.