Results 31 to 40 of about 2,200,433 (156)
Primordial black holes from modified supergravity
European Physical Journal C: Particles and Fields, 2020 The modified supergravity approach is applied to describe a formation of Primordial Black Holes (PBHs) after Starobinsky inflation. Our approach naturally leads to the two-(scalar)-field attractor-type double inflation, whose first stage is driven by ...
Yermek Aldabergenov +2 more
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The formation probability of primordial black holes
Physics Letters B, 2021 We calculate the formation probability of primordial black holes generated during the collapse at horizon re-entry of large fluctuations produced during inflation, such as those ascribed to a period of ultra-slow-roll.
Matteo Biagetti +4 more
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On the primordial black hole mass function for broad spectra
Physics Letters B, 2020 We elaborate on the mass function of primordial black holes in the case in which the power spectrum of the curvature perturbation is broad. For the case of a broad and flat spectrum, we argue that such a mass function is peaked at the smallest primordial
V. De Luca, G. Franciolini, A. Riotto
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Classical and thermodynamic stability of black holes [PDF]
, 2010 We consider the stability of black holes within both classical general relativity and the semiclassical thermodynamic description. In particular, we study linearised perturbations and their contributions to the gravitational partition function. Exploring
core +2 more sources
The dark universe: Primordial black hole ⇋ dark graviton gas connection
Physics Letters B, 2023 We study the possible correspondence between 5-dimensional primordial black holes and massive 5-dimensional KK gravitons as dark matter candidate within the recently proposed dark dimension scenario that addresses the cosmological hierarchy problem ...
Luis A. Anchordoqui +2 more
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Primordial Regular Black Holes: Thermodynamics and Dark Matter
Universe, 2018 The possibility that dark matter particles could be constituted by extreme regular primordial black holes is discussed. Extreme black holes have zero surface temperature, and are not subjected to the Hawking evaporation process.
José Antonio de Freitas Pacheco
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Primordial black holes in matter-dominated eras: The role of accretion
Physics Letters B, 2022 We consider the role of secondary infall and accretion onto an initially overdense perturbation in matter-dominated eras, like the one which is likely to follow the end of inflation.
Valerio De Luca +4 more
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Primordial black holes as dark matter candidates
SciPost Physics Lecture Notes, 2022 We review the formation and evaporation of primordial black holes (PBHs) and their possible contribution to dark matter. Various constraints suggest they could only provide most of it in the mass windows $10^{17}$ - $10^{23}\,$g or $10$ - $10^{2}\,M_ ...
Bernard Carr, Florian Kuhnel
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On Mass Spectra of Primordial Black Holes
Frontiers in Astronomy and Space Sciences, 2021 Evidence for the primordial black holes (PBH) presence in the early Universe renews permanently. New limits on their mass spectrum challenge existing models of PBH formation.
Alexander A. Kirillov +2 more
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Insect Science, EarlyView.• First demonstration of functional RNAi in the beet leafhopper, Neoaliturus tenellus, using both dsRNA microinjection and star polycation nanoparticle‐mediated topical spray delivery.•Microinjection achieved over 90% knockdown of Gus and Pum3, revealing gene‐specific fitness effects on survival and fecundity in beet leafhopper.•Nanoparticle‐mediated ...
Jinlong Han +8 more
wiley +1 more source