Accretion of clumpy cold gas onto massive black hole binaries: a possible fast route to binary coalescence
Accretion of clumpy cold gas onto massive black hole binaries: a possible fast route to binary coalescence
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块状冷气体吸积到大质量黑洞双星上:双星合并的可能快速途径
DOI:
10.1093/mnras/sty1709
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发表时间:
2018
影响因子:
4.8
通讯作者:
Cuadra
中科院分区:
文献类型:
--
作者:
Goicovic;Felipe G;Maureira-Fredes;Cristian;Sesana;Alberto;Amaro-Seoane;Cuadra
In currently favoured hierarchical cosmologies, the formation of massive black hole binaries (MBHBs) following galaxy mergers is unavoidable. Still, due the complex physics governing the (hydro)dynamics of the post-merger dense environment of stars and gas in galactic nuclei, the final fate of those MBHBs is still unclear. In gas-rich environments, it is plausible that turbulence and gravitational instabilities feed gas to the nucleus in the form of a series of cold incoherent clumps, thus providing a way to exchange energy and angular momentum between the MBHB and its surroundings. Within this context, we present a suite of smoothed-particle-hydrodynamical models to study the evolution of a sequence of near-radial turbulent gas clouds as they infall towards equal-mass, circular MBHBs. We focus on the dynamical response of the binary orbit to different levels of anisotropy of the incoherent accretion events. Compared to a model extrapolated from a set of individual cloud-MBHB interactions, we find that accretion increases considerably and the binary evolution is faster. This occurs because the continuous infall of clouds drags inwards circumbinary gas left behind by previous accretion events, thus promoting a more effective exchange of angular momentum between the MBHB and the gas. These results suggest that sub-parsec MBHBs efficiently evolve towards coalescence during the interaction with a sequence of individual gas pockets.
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影响因子:
4.8
作者:
F. Goicovic;A. Sesana;J. Cuadra;F. Stasyszyn
通讯作者:
F. Stasyszyn
影响因子:
4.8
作者:
Tang, Yike;Haiman, Zoltán;MacFadyen, Andrew
通讯作者:
MacFadyen, Andrew
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:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
S. Nayakshin;A. King
通讯作者:
A. King
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