Results 21 to 30 of about 2,200,433 (156)
Neutrino primordial Planckian black holes
Physics Letters B, 2021 Extremal rotating black holes can be formed in the Planck energy scattering of Dirac spin parallel neutrinos in the mass state m2 (assuming m1=0), owing to the repulsive interaction between their magnetic dipoles, induced by vacuum fluctuations. Assuming
Saulo Carneiro +2 more
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Cosmic necklaces in string theory and field theory [PDF]
, 2010 PhDIn this thesis we investigate astrophysical phenomena which arise in models with compact extra dimensions, focussing on the cosmological consequences of strings which wrap cycles in the internal space. Embedding our strings in the Klebanov-Strassler
Lake, Matthew James
core +4 more sources
Formation and Clustering of Primordial Black Holes in Brans-Dicke Theory
Universe, 2020 The formation of primordial black holes in the early universe in the Brans-Dicke scalar-tensor theory of gravity is investigated. Corrections to the threshold value of density perturbations are found.
Victor Berezin +3 more
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Were recently reported MHz events planet mass primordial black hole mergers?
European Physical Journal C: Particles and Fields, 2021 A bulk acoustic wave cavity as high frequency gravitational wave antenna has recently detected two rare events at 5.5MHz. Assuming that the detected events are due to gravitational waves, their characteristic strain amplitude lies at about $$h_c\approx 2.
Guillem Domènech
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GW200105 and GW200115 are compatible with a scenario of primordial black hole binary coalescences
European Physical Journal C: Particles and Fields, 2022 Two gravitational wave events, i.e. GW200105 and GW200115, were observed by the Advanced LIGO and Virgo detectors recently. In this work, we show that they can be explained by a scenario of primordial black hole binaries that are formed in the early ...
Sai Wang, Zhi-Chao Zhao
doaj +1 more source
Galaxies, 2023 The discovery of gravitational waves from merging binary black holes has generated considerable interest in examining whether these black holes could have a primordial origin.
H. V. Ragavendra, L. Sriramkumar
doaj +1 more source
Accretion Into and Emission from Black Holes [PDF]
, 1976 Analyses are given of various processes involving matter falling into or coming out of black holes. A significant amount of matter may fall into a black hole in a galactic nucleus or in a binary system.
Page, Don Nelson
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Clusters of Primordial Black Holes
European Physical Journal C: Particles and Fields, 2019 The Primordial Black Holes (PBHs) are a well-established probe for new physics in the very early Universe. We discuss here the possibility of PBH agglomeration into clusters that may have several prominent observable features.
Konstantin M. Belotsky +9 more
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Production of Primordial Black Holes in Improved E-Models of Inflation
Universe, 2023 E-type α-attractor models of single-field inflation were generalized further in order to accommodate production of primordial black holes (PBHs) via adding a near-inflection point to the inflaton scalar potential at smaller scales, in good agreement with
Daniel Frolovsky, Sergei V. Ketov
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Physics Letters B, 2023 Primordial black holes (PBHs) can be both candidates of dark matter and progenitors of binary black holes (BBHs) detected by the LIGO-Virgo-KAGRA collaboration.
Li-Ming Zheng +4 more
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