Results 21 to 30 of about 38,497 (193)
This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor J. Andrews) to be published by Elsevier as a Reference Module.
Carr, Bernard, Kuhnel, Florian
+9 more sources
Primordial black hole reheating
Physical Review D, 2023 17 pages, 9 ...
Haque, Md Riajul +3 more
openaire +3 more sources
Origin and growth of primordial black holes
Physics Letters B, 2021 Building on the insight that primordial black holes can arise from the formation and subsequent gravitational collapse of bound states of stable supermassive elementary particles during the early radiation era, we offer a comprehensive picture describing
Krzysztof A. Meissner, Hermann Nicolai
doaj +1 more source
European Physical Journal C: Particles and Fields, 2023 The observational data of primordial black holes and scalar-induced gravitational waves can constrain the primordial curvature perturbation at small scales. We parameterize the primordial curvature perturbation by a broken power law form and find that it
Zhu Yi, Qin Fei
doaj +1 more source
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
doaj +1 more source
Primordial black holes from confinement [PDF]
Physical Review D, 2021 A mechanism for the formation of primordial black holes is proposed. Here, heavy quarks of a confining gauge theory produced by de Sitter fluctuations are pushed apart by inflation and get confined after horizon re-entry. The large amount of energy stored in the colour flux tubes connecting the quark pair leads to black-hole formation.
Gia Dvali +2 more
openaire +3 more sources
Inflation and Primordial Black Holes
Universe, 2023 We review conceptual aspects of inflationary scenarios able to produce primordial black holes by amplifying the size of curvature fluctuations to the level required to trigger black hole formation. We identify general mechanisms to do so, both for single-
Ogan Özsoy, Gianmassimo Tasinato
doaj +1 more source
Turning in the landscape: A new mechanism for generating primordial black holes
Physics Letters B, 2023 We propose a new model-independent mechanism for producing primordial black holes from a period of multi-field inflation. This requires an enhancement of primordial fluctuations at short scales compared to their value at CMB scales.
Jacopo Fumagalli +3 more
doaj +1 more source
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
doaj +1 more source
Probability for primordial black holes [PDF]
Physical Review D, 1995 16 pages, LaTeX, accepted for publication in Phys. Rev. D; we have added brief remarks on the generality of our results and on the validity of the semiclassical ...
Bousso, R., Hawking, S. W.
openaire +3 more sources