Results 81 to 90 of about 176,413 (293)

On stochastic effects and primordial black-hole formation

European Physical Journal C: Particles and Fields, 2019
The effect of large quantum fluctuations on primordial black-hole formation for inflationary models with a quasi-inflection point is investigated. By using techniques of stochastic inflation in combination with replica field theory and the Feynman–Jensen
Florian Kühnel, Katherine Freese
doaj   +1 more source

Early clustering of DM particles around PBHs Density profiles and signatures [PDF]

EPJ Web of Conferences
Primordial black holes may have been produced in the early stages of the universe, after cosmic inflation. If so, dark matter in the form of elementary particles can be subsequently accreted around these objects, in particular when it gets non ...
Salati Pierre, Lavalle Julien
doaj   +1 more source

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

Primordial black hole production due to preheating [PDF]

, 2001
During the preheating process at the end of inflation the amplification of field fluctuations can lead to the amplification of curvature perturbations.
A.M. Green, A.R. Liddle, A.R. Liddle, Anne M. Green, B.A. Bassett, B.A. Bassett, B.A. Bassett, B.J. Carr, D. Boyanovsky, D. Kaiser, D. Wands, D.I. Kaiser, F. Finelli, J. Traschen, J.C. Niemeyer, J.C. Niemeyer, J.P. Zibin, J.S. Bullock, K. Jedamzik, Karim A. Malik, L. Kofman, P. Greene, P. Ivanov, P. Ivanov, R. Easther, Y. Shtanov   +25 more
core   +2 more sources

Cosmic Evolution and Primordial Black Hole Evaporation [PDF]

, 2002
A cosmological model in which primordial black holes (PBHs) are present in the cosmic fluid at some instant t=t_0 is investigated. The time t_0 is naturally identified with the end of the inflationary period. The PBHs are assumed to be nonrelativistic in
G. Halnes, G. Hayward, I. Brevik, I. Brevik, I. Brevik, J.D. Barrow, S. Weinberg, W. Zimdahl, W. Zimdahl, W. Zimdahl   +9 more
core   +4 more sources

Early black-hole seeds in the first billion years [PDF]

, 2020
Supermassive black holes with billion solar masses are in place already within the first Gyr, however, their origin and growth in such a short lapse of time is extremely challenging to understand.
Maio, Umberto
core   +2 more sources

Disentangling the potential dark matter origin of LIGO's black holes

, 2017
The nature of dark matter remains one of the biggest open questions in physics. Intriguingly, it has been suggested that dark matter may be explained by another recently observed phenomenon: the detection of gravitational waves by LIGO.
Hanna, Chad, Magee, Ryan
core   +1 more source

Cosmic evolution during primordial black hole evaporation [PDF]

, 1998
Primordial black holes with a narrow mass range are regarded as a nonrelativistic fluid component with an equation of state for dust. The impact of the black hole evaporation on the dynamics of the early universe is studied by resorting to a two-fluid ...
Pavón, Diego, Zimdahl, Winfried
core   +2 more sources

Non-cold dark matter from primordial black hole evaporation [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
Dark matter coupled solely gravitationally can be produced through the decay of primordial black holes in the early universe. If the dark matter is lighter than the initial black hole temperature, it could be warm enough to be subject to structure ...
Iason Baldes, Quentin Decant, D. C. Hooper, L. Lopez-Honorez   +3 more
semanticscholar   +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