scholarly journals New criterion for direct black hole formation in rapidly rotating stellar collapse

2004 ◽  
Vol 70 (8) ◽  
Author(s):  
Yu-ichirou Sekiguchi ◽  
Masaru Shibata
Keyword(s):  
Black Hole ◽  
Hole Formation ◽  
Black Hole Formation ◽  
Stellar Collapse ◽  
New Criterion

scholarly journals Studies of Stellar Collapse and Black Hole Formation with the Open-Source Code GR1D

2010 ◽  
Author(s):  
C. D. Ott ◽  
E. O’Connor ◽  
Isao Tanihara ◽  
Hooi Jin Ong ◽  
Atsushi Tamii ◽  
...  
Keyword(s):  
Black Hole ◽  
Open Source ◽  
Source Code ◽  
Hole Formation ◽  
Open Source Code ◽  
Black Hole Formation ◽  
Stellar Collapse

scholarly journals Black-Hole Formation in Potential γ-Ray Burst Progenitors

2011 ◽  
Vol 7 (S279) ◽  
pp. 373-374
Author(s):  
Evan O'Connor ◽  
Luc Dessart ◽  
Christian D. Ott
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Iron Core ◽  
Hole Formation ◽  
Black Hole Formation ◽  
Stellar Collapse ◽  
Central Engine ◽  
Long Duration ◽  
Γ Ray ◽  
Fast Rotating

AbstractWe present the results of a study by Dessart et al. (2012), where we performed stellar collapse simulations of proposed long-duration γ-ray burst (LGRB) progenitor models and assessed the prospects for black hole formation. We find that many of the proposed LGRB candidates in Woosley & Heger (2006) have core structures similar to garden-variety core-collapse supernova progenitors and thus are not expected to form black holes, which is a key ingredient of the collapsar model of LGRBs. The small fraction of proposed progenitors that are compact enough to form black holes have fast rotating iron cores, making them prone to a magneto-rotational explosion and the formation of a proto-magnetar rather than a black hole. This leads us to our take-home message, that one must consider the iron-core structure (eg. ρ(r), Ω(r)) of evolved massive stars before making assumptions on the central engine of LGRBs.

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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