The origins of off-centre massive black holes in dwarf galaxies
The origins of off-centre massive black holes in dwarf galaxies
复制标题
矮星系中偏心大质量黑洞的起源
DOI:
10.1093/mnras/stab1665
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发表时间:
2021
影响因子:
4.8
通讯作者:
Van Nest, Jordan
中科院分区:
文献类型:
--
作者:
Bellovary, Jillian M;Hayoune, Sarra;Chafla, Katheryn;Vincent, Donovan;Brooks, Alyson;Christensen, Charlotte R;Munshi, Ferah D;Tremmel, Michael;Quinn, Thomas R;Van Nest, Jordan
Massive black holes often exist within dwarf galaxies, and both simulations and observations have shown that a substantial fraction of these may be off-centre with respect to their hosts. We trace the evolution of off-centre massive black holes (MBHs) in dwarf galaxies using cosmological hydrodynamical simulations, and show that the reason for off-centre locations is mainly due to galaxy–galaxy mergers. We calculate dynamical time-scales and show that off-centre MBHs are unlikely to sink to their galaxys’ centres within a Hubble time, due to the shape of the hosts’ potential wells and low stellar densities. These wandering MBHs are unlikely to be detected electromagnetically, nor is there a measurable dynamical effect on the galaxy’s stellar population. We conclude that off-centre MBHs may be common in dwarfs, especially if the mass of the MBH is small or the stellar mass of the host galaxy is large. However, detecting them is extremely challenging, because their accretion luminosities are very low and they do not measurably alter the dynamics of their host galaxies.
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DOI:
10.1086/520504
发表时间:
2007
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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DOI:
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2018-05
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DOI:
10.3847/1538-4357/abe2ab
发表时间:
2021
期刊:
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影响因子:
--
作者:
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DOI:
10.1186/s40668-015-0007-9
发表时间:
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期刊:
Computational Astrophysics and Cosmology
影响因子:
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作者:
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通讯作者:
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DOI:
10.1111/j.1365-2966.2012.20696.x
发表时间:
2012-02
期刊:
arXiv: Cosmology and Nongalactic Astrophysics
影响因子:
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作者:
F. Governato;A. Zolotov;A. Pontzen;C. Christensen;S. Oh;A. Brooks;T. Quinn;S. Shen;J. W. U. O. Wa
通讯作者:
F. Governato;A. Zolotov;A. Pontzen;C. Christensen;S. Oh;A. Brooks;T. Quinn;S. Shen;J. W. U. O. Wa