Results 31 to 40 of about 6,073,030 (236)
An escaping outflow in a galaxy with an intermediate-mass black hole
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT While in massive galaxies active galactic nucleus (AGN) feedback plays an important role, the role of AGN feedback is still under debate in dwarf galaxies. With well spatially resolved data obtained from the Multi-Unit Spectroscopic Explorer, we identify a spatially extended ($\rm \sim 3\,\, kpc$) and fast ($V_{80} \sim 471\,\, \
Zhiyuan Zheng +7 more
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Hypervelocity Stars from a Supermassive Black Hole–Intermediate-mass Black Hole Binary [PDF]
The Astrophysical Journal, 2019 Abstract In this paper we consider a scenario in which the currently observed hypervelocity stars in our Galaxy have been ejected from the Galactic center as a result of dynamical interactions with an intermediate-mass black hole (IMBH) orbiting the central supermassive black hole (SMBH).
Alexander Rasskazov +6 more
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Tidal capture of stars by intermediate-mass black holes [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 Recent X-ray observations and theoretical modelling have made it plausible that some ultraluminous X-ray sources (ULX) are powered by intermediate-mass black holes (IMBHs). N-body simulations have also shown that runaway merging of stars in dense star clusters is a way to form IMBHs.
Baumgardt, H. +3 more
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Growth of Intermediate‐Mass Black Holes in Globular Clusters [PDF]
The Astrophysical Journal, 2004 We present results of numerical simulations of sequences of binary-single scattering events of black holes in dense stellar environments. The simulations cover a wide range of mass ratios from equal mass objects to 1000:10:10 solar masses and compare purely Newtonian simulations to simulations in which Newtonian encounters are interspersed with ...
Gultekin, Kayhan +2 more
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THE CLOSE STELLAR COMPANIONS TO INTERMEDIATE-MASS BLACK HOLES [PDF]
The Astrophysical Journal, 2016 ABSTRACT When embedded in dense cluster cores, intermediate-mass black holes (IMBHs) acquire close stellar or stellar-remnant companions. These companions are not only gravitationally bound, but also tend to hierarchically isolate from other cluster stars through series of multibody encounters.
Morgan MacLeod +2 more
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On the dynamic formation of accreting intermediate-mass black holes [PDF]
Astronomical & Astrophysical Transactions, 2007 We compute the probability that intermediate mass black holes (IMBHs) capture companions due to dynamical interactions and become accreting sources, and explore the possibility that the accreting IMBHs would appear as ultra-luminous X-ray sources (ULXs). We focus on IMBHs originating from low-metallicity Population III stars.
Kuranov, A. G. +4 more
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The Formation of Intermediate-mass Black Holes in Galactic Nuclei
The Astrophysical Journal Letters, 2022 Abstract Most stellar evolution models predict that black holes (BHs) should not exist above approximately 50–70 M ⊙, the lower limit of the pair-instability mass gap. However, recent LIGO/Virgo detections indicate the existence of BHs with masses at and above this threshold.
Sanaea C. Rose +3 more
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The formation of intermediate mass black holes [PDF]
Symposium - International Astronomical Union, 2003 We study the growth rate of stars in dense star clusters by stellar collisions. Our analytic calculations are in good agreement with direct N-body simulations with up to 65536 stars performed on the GRAPE family of computers. We find that star clusters with a half mass relaxation time ≲ 20 Myr are dominated by stellar collisions.
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The Hunt for Intermediate-mass Black Holes in the JWST Era [PDF]
The Astrophysical Journal, 2018 AbstractIntermediate-mass black holes (IMBHs), with masses between 100–105M⊙, fill the gap between stellar mass black holes and the supermassive black holes that reside in galaxy centers. While IMBHs are crucial to our understanding of black hole seed formation, black holes of less than ≈104M⊙have so far eluded detection by traditional searches ...
Jenna M. Cann +6 more
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GW231123: Likely a Product of Successive Mergers from ∼10 Stellar-mass Black Holes
The Astrophysical JournalGW231123 is an exceptionally massive binary black hole (BBH) merger with unusually high component spins. Such extreme properties challenge conventional stellar evolution models, predicting a black hole (BH) mass gap due to pair-instability supernovae. We
Yin-Jie Li +3 more
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