Empirical Lower Mass Limit for Black-Hole Formation in a Massive Binary

2006 ◽  
pp. 289-294 ◽  
Author(s):  
Lex Kaper ◽  
Anatol Cherepashchuk
Keyword(s):  
Black Hole ◽  
Mass Limit ◽  
Hole Formation ◽  
Lower Mass ◽  
Black Hole Formation ◽  
Lower Mass Limit

Observational lower mass limit for black hole formation derived from massive X-ray binaries

Nature ◽  
1984 ◽  
Vol 309 (5969) ◽  
pp. 598-600 ◽  
Author(s):  
E. P. J. van den Heuvel ◽  
G. M. H. J. Habets
Keyword(s):  
Black Hole ◽  
Mass Limit ◽  
Hole Formation ◽  
Lower Mass ◽  
X Ray ◽  
Black Hole Formation ◽  
X Ray Binaries ◽  
Lower Mass Limit

scholarly journals Evolution of primordial black hole spin due to Hawking radiation

2020 ◽  
Vol 494 (1) ◽  
pp. 1257-1262 ◽  
Author(s):  
Alexandre Arbey ◽  
Jérémy Auffinger ◽  
Joseph Silk
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
High Spin ◽  
Hawking Radiation ◽  
Primordial Black Hole ◽  
Mass Limit ◽  
Lower Mass ◽  
Thin Disc ◽  
Kerr Black Holes ◽  
Lower Mass Limit

ABSTRACT Near extremal Kerr black holes (BHs) are subject to the Thorne limit $a\lt a^*_{\rm lim}=0.998$ in the case of thin disc accretion, or some generalized version of this in other disc geometries. However, any limit that differs from the thermodynamics limit a* < 1 can in principle be evaded in other astrophysical configurations, and in particular if the near extremal BHs are primordial and subject to evaporation by Hawking radiation only. We derive the lower mass limit above which Hawking radiation is slow enough so that a primordial black hole with a spin initially above some generalized Thorne limit can still be above this limit today. Thus, we point out that the observation of Kerr BHs with extremely high spin should be a hint of either exotic astrophysical mechanisms or primordial origin.

scholarly journals Black Hole Formation in the Lower Mass Gap through Mergers and Accretion in AGN Disks

2020 ◽  
Vol 901 (2) ◽  
pp. L34 ◽  
Author(s):  
Y. Yang ◽  
V. Gayathri ◽  
I. Bartos ◽  
Z. Haiman ◽  
M. Safarzadeh ◽  
...  
Keyword(s):  
Black Hole ◽  
Hole Formation ◽  
Lower Mass ◽  
Black Hole Formation ◽  
Mass Gap

scholarly journals Feeding and feedback from little monsters: AGN in dwarf galaxies

2020 ◽  
Vol 15 (S359) ◽  
pp. 238-242
Author(s):  
Mar Mezcua
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Early Universe ◽  
Dwarf Galaxies ◽  
Scaling Relations ◽  
Strong Impact ◽  
Hole Formation ◽  
Intermediate Mass ◽  
Black Hole Formation ◽  
Low Mass

AbstractDetecting the seed black holes from which quasars formed is extremely challenging; however, those seeds that did not grow into supermassive should be found as intermediate-mass black holes (IMBHs) of 100 – 105 M⊙ in local dwarf galaxies. The use of deep multiwavelength surveys has revealed that a population of actively accreting IMBHs (low-mass AGN) exists in dwarf galaxies at least out to z ˜3. The black hole occupation fraction of these galaxies suggests that the early Universe seed black holes formed from direct collapse of gas, which is reinforced by the possible flattening of the black hole-galaxy scaling relations at the low-mass end. This scenario is however challenged by the finding that AGN feedback can have a strong impact on dwarf galaxies, which implies that low-mass AGN in dwarf galaxies might not be the untouched relics of the early seed black holes. This has important implications for seed black hole formation models.

scholarly journals Quantum black hole formation in the BFSS matrix model

2015 ◽  
Vol 2015 (7) ◽  
Author(s):  
Sinya Aoki ◽  
Masanori Hanada ◽  
Norihiro Iizuka
Keyword(s):  
Black Hole ◽  
Matrix Model ◽  
Hole Formation ◽  
Quantum Black Hole ◽  
Black Hole Formation
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