Results 11 to 20 of about 647,754 (283)

A small and vigorous black hole in the early Universe. [PDF]

Nature
Maiolino R, Scholtz J, Witstok J, Carniani S, D'Eugenio F, de Graaff A, Übler H, Tacchella S, Curtis-Lake E, Arribas S, Bunker A, Charlot S, Chevallard J, Curti M, Looser TJ, Maseda MV, Rawle TD, Rodríguez Del Pino B, Willott CJ, Egami E, Eisenstein DJ, Hainline KN, Robertson B, Williams CC, Willmer CNA, Baker WM, Boyett K, DeCoursey C, Fabian AC, Helton JM, Ji Z, Jones GC, Kumari N, Laporte N, Nelson EJ, Perna M, Sandles L, Shivaei I, Sun F.   +38 more
europepmc   +2 more sources

Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect

Journal of High Energy Physics, 2020
The chiral magnetic effect (CME) is a phenomenon in which an electric current is induced parallel to an external magnetic field in the presence of chiral asymmetry in a fermionic system.
Kohei Kamada, Chang Sub Shin
doaj   +1 more source

New description of the scaling evolution of the cosmological magneto-hydrodynamic system

Physics Letters B, 2023
We present a new description of cosmological evolution of the primordial magnetic field under the condition that it is non-helical and its energy density is larger than the kinetic energy density.
Fumio Uchida, Motoko Fujiwara, Kohei Kamada, Jun'ichi Yokoyama   +3 more
doaj   +1 more source

Blazars in the early Universe [PDF]

, 2011
We investigate the relative occurrence of radio--loud and radio-quiet quasars in the first billion years of the Universe, powered by black holes heavier than one billion solar masses. We consider the sample of high-redshfit blazars detected in the hard X-
Abdo, Ajello, Baes, Becker, Bernardi, Bryan, Croton, F. Haardt, Ferrarese, G. Ghisellini, Ghisellini, Ghisellini, Ghisellini, Gültekin, Haiman, Hook, Hopkins, Häring, Jiang, Kormendy, Kormendy, Kurk, Lauer, Lauer, M. Volonteri, Marconi, Marconi, McGreer, Merloni, Pizzella, R. Della Ceca, Rhook, Richards, Richards, Romani, Schneider, Shakura, Shen, Sheth, Treister, Tremaine, Tundo, Volonteri, Volonteri, Willott, Worsley, Worsley, Wyithe, Yuan   +48 more
core   +1 more source

Acoustics of early universe. I. Flat versus open universe models [PDF]

, 2000
A simple perturbation description unique for all signs of curvature, and based on the gauge-invariant formalisms is proposed to demonstrate that: (1) The density perturbations propagate in the flat radiation-dominated universe in exactly the same way ...
Andrzej Woszczyna, Birrell N D, Challinor A, Chibisov G V, Gelfand I M, Golda Z, Grishchuk L P, Kodama H, Kosowsky A, Landau L D, Lifshitz E, Lifshitz E M, Lukash V N, Lukash V N, Naimark M A, Padmanabhan T, Peacock J A, Peacock J A, Peebles P J E, Sakai K, Sakharov A D, Sasaki M, Sobczyk K, Stewart J M, Voglis N, Weinberg S, Whitham G B, Whittaker E T, Woszczyna A, Yaglom M, Zdzislaw A Golda   +30 more
core   +2 more sources

Implication of pulsar timing array experiments on cosmological gravitational wave detection

AAPPS Bulletin, 2021
Gravitational waves provide a new probe of the Universe which can reveal a number of cosmological and astrophysical phenomena that cannot be observed by electromagnetic waves.
Jun’ichi Yokoyama
doaj   +1 more source

Early Universe models from Noncommutative Geometry [PDF]

, 2009
We investigate cosmological predictions on the early universe based on the noncommutative geometry models of gravity coupled to matter. Using the renormalization group analysis for the Standard Model with right handed neutrinos and Majorana mass terms ...
Marcolli, Matilde, Pierpaoli, Elena
core   +2 more sources

Precursors of Supernovae from Mass Eruption: Prospects for Early Warning of Nearby Core-collapse Supernovae

The Astrophysical Journal, 2023
Recent observations of a large fraction of Type II supernovae (SNe) show traces of dense circumstellar medium (CSM) very close to the progenitor star. If this CSM is created by eruptive mass loss several months before core collapse, the eruption itself ...
Daichi Tsuna, Yuki Takei, Toshikazu Shigeyama   +2 more
doaj   +1 more source

Conditions for spontaneous homogenization of the Universe [PDF]

, 2010
The present-day Universe appears to be homogeneous on very large scales. Yet when the casual structure of the early Universe is considered, it becomes apparent that the early Universe must have been highly inhomogeneous.
A. Krasiński, A. Linde, A.A. Coley, A.D. Linde, A.G. Riess, C.B. Collins, C.W. Misner, D.J. Eisenstein, D.J. McManus, D.S. Goldwirth, D.S. Goldwirth, D.S. Goldwirth, E. Calzetta, G. Hinshaw, G.F.R. Ellis, H. Elst van, J. Ehlers, J. Plebański, J. Silk, K. Bolejko, K.T. Inoue, K.T. Inoue, Krzysztof Bolejko, M.J. Rees, P. Szekeres, R.M. Wald, S. Perlmutter, S.R. Roy, S.W. Hawking, V. Mukhanov, W.B. Bonnor, W.B. Bonnor, W.R. Stoeger, William R. Stoeger   +33 more
core   +1 more source

The cosmic microwave background radiation power spectrum as a random bit generator for symmetric- and asymmetric-key cryptography

Heliyon, 2017
In this note, the Cosmic Microwave Background (CMB) Radiation is shown to be capable of functioning as a Random Bit Generator, and constitutes an effectively infinite supply of truly random one-time pad values of arbitrary length.
Jeffrey S. Lee, Gerald B. Cleaver
doaj   +1 more source