The structure of the ultrarelativistic prompt emission phase and the properties of the black hole in GRB 180720B by F. Rastegarnia, R. Moradi, J. A. Rueda, R. Ruffini, Liang Li, S. Eslamzadeh, Y. Wang, S. S. Xue

“…We also estimate the strength of the surrounding magnetic field $$\sim 10^{14}$$ ∼ 10 14 G, and obtain a lower limit to the BH mass, $$M=2.4~M_\odot $$ M = 2.4 M ⊙ , and correspondingly an upper limit to the spin, $$\alpha = 0.6$$ α = 0.6 , from the conditions that the UPE is powered by the Kerr BH extractable energy and its mass is bound from below by the NS critical mass.…”
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MeV, GeV and TeV Neutrinos from Binary-Driven Hypernovae by S. Campion, J. D. Uribe-Suárez, J. D. Melon Fuksman, J. A. Rueda

“…For orbital periods of a few minutes, the NS reaches the critical mass and forms a black hole (BH). Two physical situations produce MeV neutrinos. …”
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Baryon-induced Collapse of Dark Matter Cores into Supermassive Black Holes by C. R. Argüelles, J. A. Rueda, R. Ruffini

“…For a given fermion mass, the core has a critical mass that collapses into a supermassive black hole (SMBH). …”
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Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts by J. A. Rueda, R. Ruffini, Y. Wang

“…By accretion the NS can become either a more massive NS or reach the critical mass for gravitational collapse with consequent formation of a BH. …”
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