Results 41 to 50 of about 38,497 (193)

Antiprotons from primordial black holes [PDF]

Astronomy & Astrophysics, 2002
Accepted by A&A .
A. Barrau, Gaelle Boudoul, DONATO, Fiorenza, D. Maurin, P. Salati, R. Taillet   +5 more
openaire   +4 more sources

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
doaj   +1 more source

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, Gabriele Franciolini, Alex Kehagias, Paolo Pani, Antonio Riotto   +4 more
doaj   +1 more source

Accretion, Primordial Black Holes and Standard Cosmology

, 2011
Primordial Black Holes evaporate due to Hawking radiation. We find that the evaporation time of primordial black holes increase when accretion of radiation is included.Thus depending on accretion efficiency more and more number of primordial black holes ...
A Barrau, A Polnarev, AS Majumdar, AS Majumdar, B NAYAK, B Nayak, B Ya, BJ Carr, BJ Carr, BJ Carr, BJ Carr, CO Lousto, D Blais, D Blais, D La, D Page, H Kodma, ID Novikov, J MacGibbon, JD Barrow, JH MacGibbon, KJ Mack, L P SINGH, L Susskind, MY Kholpov, MY Kholpov, S Wienberg, SW Hawking, SW Hawking   +28 more
core   +1 more source

Relativistic Images in Randall-Sundrum II Braneworld Lensing [PDF]

, 2010
In this paper, we explore the properties of gravitational lensing by black holes in the Randall-Sundrum II braneworld. We use numerical techniques to calculate lensing observables using the Tidal Reissner-Nordstrom (TRN) and Garriga-Tanaka metrics to ...
A. Petter, Amitai Y. Bin-Nun, J. Wambsganss, P. Schneider, R. Maartens, S. Hawking, S. Weinberg   +6 more
core   +3 more sources

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
doaj   +1 more source

Brans-Dicke Theory and primordial black holes in Early Matter-Dominated Era

, 2011
We show that primordial black holes can be formed in the matter-dominated era with gravity described by the Brans-Dicke theory. Considering an early matter-dominated era between inflation and reheating, we found that the primordial black holes formed ...
A. Barrau, A. Polnarev, A. Sheykhi, A.G. Polnarev, A.G. Polnarev, A.G. Riess, A.S. Majumdar, B. Bertotti, B. Nayak, B. Nayak, B. Nayak, B. Nayak, B. Nayak, B.J. Carr, B.J. Carr, B.J. Carr, B.J. Carr, B.K. Sahoo, B.K. Sahoo, C. Mathiazhagan, C.H. Brans, D. Blais, D. Blais, D. La, D.C. Guariento, D.N. Page, F. Paolis De, H. Kodma, I. Musco, J. Garcia-Bellido, J. Yokoyama, J. Yokoyama, J.A.S. Lima, J.C. Hildago, J.C. Niemeyer, J.C. Niemeyer, J.D. Barrow, J.D. Barrow, J.D. Bekenstein, J.D. Bekenstein, J.H. MacGibbon, K. Jedamzik, K. Nozari, K.J. Mack, L. Alabidi, L. P. Singh, M. Jamil, M. Jamil, M. Jamil, M. Jamil, M. Jamil, M. Kawasaki, M.R. Setare, M.Y. Khlopov, M.Y. Khlopov, M.Y. Khlopov, N. Banerjee, O. Bertolami, P. Ivanov, P.H. Frampton, P.M. Garnavich, S. Perlmutter, S.G. Rubin, S.W. Hawking, S.W. Hawking, T. Kawaguchi, Ya.B. Zeldovich, Ya.B. Zel’dovich   +67 more
core   +1 more source

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
doaj   +1 more source

Production of high stellar-mass primordial black holes in trapped inflation

, 2017
Trapped inflation has been proposed to provide a successful inflation with a steep potential. We discuss the formation of primordial black holes in the trapped inflationary scenario.
Cheng, Shu-Lin, Lee, Wolung, Ng, Kin-Wang   +2 more
core   +1 more source

Origin of Correlations between Central Black Holes Masses and Galactic Bulge Velocity Dispersions [PDF]

, 2002
We argue that the observed correlations between central black holes masses M_{BH} and galactic bulge velocity dispersions \sigma_e in the form M_{BH}\propto\sigma_e^4 may witness on the pregalactic origin of massive black holes.
Starobinsky A. A., V I. Dokuchaev, Y. N. Eroshenko, Zel'dovich Ya. B.   +3 more
core   +3 more sources