Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures
Accretion of clumpy cold gas on to massive black hole binaries: the challenging formation of extended circumbinary structures
复制标题
块状冷气体在大质量黑洞双星上的吸积:扩展的环绕双星结构的形成具有挑战性
DOI:
10.1093/mnras/sty1105
复制
发表时间:
2018
影响因子:
4.8
通讯作者:
Alberto
中科院分区:
文献类型:
--
作者:
Maureira-Fredes;Cristián;Goicovic;Felipe G;Amaro-Seoane;Sesana;Alberto
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 the MBHB. 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.
登录
查看更多内容
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
S. Dougan;C. Nixon;A. King;Daniel J. Price
通讯作者:
Daniel J. Price
影响因子:
4.8
作者:
F. Goicovic;A. Sesana;J. Cuadra;F. Stasyszyn
通讯作者:
F. Stasyszyn
DOI:
10.1086/301240
发表时间:
1999
期刊:
The Astronomical Journal
影响因子:
--
作者:
K. Gebhardt;D. Richstone;J. Kormendy;T. Lauer;E. Ajhar;R. Bender;A. Dressler;S. Faber;C. Grillmair;J. Magorrian;S. Tremaine
通讯作者:
S. Tremaine
DOI:
10.1086/523869
发表时间:
2006-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. MacFadyen;M. Milosavljevic
通讯作者:
A. MacFadyen;M. Milosavljevic
DOI:
10.3847/1538-4357/aaaa1b
发表时间:
2017-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Gaspari;M. McDonald;S. Hamer;F. Brighenti;P. Temi;M. Gendron-Marsolais;J. Hlavacek-Larrondo;A. Edge;N. Werner;P. Tozzi;M. Sun;J. Stone;G. Tremblay;M. Hogan;D. Eckert;S. Ettori;H. Yu;V. Biffi;S. Planelles
通讯作者:
M. Gaspari;M. McDonald;S. Hamer;F. Brighenti;P. Temi;M. Gendron-Marsolais;J. Hlavacek-Larrondo;A. Edge;N. Werner;P. Tozzi;M. Sun;J. Stone;G. Tremblay;M. Hogan;D. Eckert;S. Ettori;H. Yu;V. Biffi;S. Planelles