Results 41 to 50 of about 4,991,129 (370)

Gamma-Rays from Kilonovae and the Cosmic Gamma-Ray Background [PDF]

The Astrophysical Journal, 2020
Abstract The recent detection of the gravitational-wave event GW170817, produced by the coalescence of two neutron stars, and of its optical–infrared counterpart, powered by the radioactive decay of r-process elements, has opened a new window onto gamma-ray astronomy: the direct detection of photons coming from such decays.
Pilar Ruiz-Lapuente, Oleg Korobkin, Oleg Korobkin   +2 more
openaire   +5 more sources

Black Hole Accretion in Gamma Ray Bursts

Galaxies, 2017
We study the structure and evolution of the hyperaccreting disks and outflows in the gamma ray bursts central engines. The torus around a stellar mass black hole is composed of free nucleons, Helium, electron-positron pairs, and is cooled by neutrino ...
Agnieszka Janiuk, Michal Bejger, Petra Sukova, Szymon Charzynski   +3 more
doaj   +1 more source

The optical afterglow of the short gamma-ray burst associated with GW170817 [PDF]

Nature Astronomy, 2018
The binary neutron star merger GW170817 was the first multi-messenger event observed in both gravitational and electromagnetic waves1,2. The electromagnetic signal began approximately two seconds post-merger with a weak, short burst of gamma rays3, which
J. Lyman, G. Lamb, G. Lamb, A. Levan, I. Mandel, I. Mandel, N. Tanvir, S. Kobayashi, B. Gompertz, J. Hjorth, A. Fruchter, T. Kangas, D. Steeghs, I. Steele, Z. Cano, C. Copperwheat, P. Evans, J. Fynbo, C. Gall, M. Im, L. Izzo, P. Jakobsson, B. Milvang-Jensen, P. O’Brien, J. Osborne, E. Palazzi, D. Perley, E. Pian, S. Rosswog, A. Rowlinson, S. Schulze, E. Stanway, P. Sutton, C. Thöne, A. D. U. Postigo, A. D. U. Postigo, D. Watson, K. Wiersema, R. Wijers   +38 more
semanticscholar   +1 more source

EXTRAGALACTIC GAMMA-RAYS: GAMMA RAY BURSTS AND BLAZARS [PDF]

International Journal of Modern Physics A, 2005
The extragalactic gamma-ray sky is dominated by two classes of sources: Gamma-Ray Bursts (GRBs) and radio loud active galactic nuclei whose jets are pointing at us (blazars). We believe that the radiation we receive from them originates from the transformation of bulk relativistic energy into random energy.
openaire   +3 more sources

Outliers in Spectral Time Lag-Selected Gamma Ray Bursts

Universe, 2022
It is possible that astrophysical samples are polluted by some outliers, which might belong to a different sub-class. By removing the outliers, the underlying statistical features may be revealed.
Fei-Fei Wang, Yuan-Chuan Zou
doaj   +1 more source

Gamma ray transport simulations using SGaRD code

EPJ Nuclear Sciences & Technologies, 2017
SGaRD (Spectroscopy, Gamma rays, Rapid, Deterministic) code is used for the fast calculation of the gamma-ray spectrum, produced by a spherical shielded source and measured by a detector.
Humbert Philippe, Méchitoua Boukhmès
doaj   +1 more source

Gamma-Ray Light Curves and Spectra of Models for Type-Ia Supernovae [PDF]

, 1994
Based on detailed Monte Carlo calculations, we present gamma-ray energy deposition functions, gamma-ray light curves, and gamma-ray spectra for a large set of theoretical models of Type Ia supernovae including ''classical'' detonation and deflagration ...
Hoflich, P., Khokhlov, A., Muller, E.
core   +1 more source

Flare Duty Cycle of Gamma-Ray Blazars and Implications for High-energy Neutrino Emission

The Astrophysical Journal, 2023
Gamma-ray flares of blazars may be accompanied by high-energy neutrinos due to interactions of high-energy cosmic rays in the jet with photons, as suggested by the detection of the high-energy neutrino IceCube-170922A during a major gamma-ray flare from ...
Kenji Yoshida, Maria Petropoulou, Kohta Murase, Foteini Oikonomou   +3 more
doaj   +1 more source

The GAMMA-400 gamma-ray telescope for precision gamma-ray emission investigations

Journal of Physics: Conference Series, 2016
The GAMMA-400 gamma-ray telescope with excellent angular and energy resolutions is designed to search for signatures of dark matter in the fluxes of gamma-ray emission and electrons + positrons. Precision investigations of gamma-ray emission from Galactic Center, Crab, Vela, Cygnus, Geminga, and other regions will be performed, as well as diffuse gamma-
R. Aptekar, V. A. Loginov, M. D. Kheymits, J. E. Ward, Mirko Boezio, E. Mocchiutti, A. Vacchi, Yu. I. Stozhkov, P. Cumani, E Berti, E. M. Tyurin, V. A. Dogiel, Felix Ryde, S. B. Ricciarini, Alexey Leonov, Alexey Leonov, Miriam Lucio Martinez, Nikolay Topchiev, A. A. Taraskin, M. Bongi, A. M. Galper, A. M. Galper, Marco Tavani, C. De Donato, N. Zampa, Bohdan Hnatyk, Francesco Longo, J. M. Paredes, G. I. Vasilyev, A.I. Arkhangelskiy, G Bigongiari, Nicola Mori, Piero Spillantini, Igor V. Moskalenko, A. V. Bakaldin, V. G. Zverev, O.D. Dalkarov, L. Bergstrom, P. Picozza, O. Adriani, N Finetti, Mark Pearce, Vladimir Kaplin, Maxim S. Gorbunov, Paolo Maestro, S. I. Suchkov, I. V. Arkhangelskaja, Valery Korepanov, V. Bonvicini, E. Vannuccini, A. Rappoldi, Josefin Larsson, P.W. Cattaneo, P. Yu. Naumov, G. Castellini, O. V. Serdin, M. Ulanov, P S Marrocchesi, V. N. Zirakashvili, A Tiberio, G. L. Dedenko, S. G. Bobkov, David Gascon, Lorenzo Bonechi, A. A. Kaplun, V. V. Kadilin, E. A. Bogomolov, A. L. Menshenin, V. V. Mikhailov, Roberta Sparvoli, Y. u. V. Gusakov, S. Bottai, A. A. Moiseev, M. F. Runtso, Yu. T. Yurkin, P. Papini   +75 more
openaire   +5 more sources

Gamma ray effects on flash memory cell arrays [PDF]

Nuclear Technology and Radiation Protection, 2012
Information stored in flash memories is physically represented by the absence or presence of charge on electrically isolated floating gates. Interaction of gamma rays with the insulators surrounding the floating gate produces effects that degrade the ...
Dolićanin Edin Ć.
doaj   +1 more source