Red dwarfs as sources of cosmic rays and detection of TeV gamma-rays from these stars

2019 ◽  
Vol 64 (12) ◽  
pp. 2585-2594 ◽  
Author(s):  
Vera G. Sinitsyna ◽  
Vera Y. Sinitsyna ◽  
Yurii I. Stozhkov
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Red Dwarfs ◽  
Tev Gamma Rays

scholarly journals Red Dwarfs as Sources of Cosmic Rays and First Detection of TeV Gamma-rays from these stars

2019 ◽  
Vol 1181 ◽  
pp. 012018 ◽  
Author(s):  
V.G. Sinitysna ◽  
V.Y. Sinitsyna ◽  
Yu.I. Stozhkov
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Red Dwarfs ◽  
Tev Gamma Rays

GAMMA-RAY BURSTS AS VHE-UHE SOURCES

2008 ◽  
Vol 17 (09) ◽  
pp. 1319-1332
Author(s):  
PETER MÉSZÁROS
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Lower Energy ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Model Parameters ◽  
Fundamental Interaction ◽  
Acceleration Mechanism ◽  
Inverse Compton ◽  
Tev Gamma Rays

Gamma-ray bursts are capable of accelerating cosmic rays up to GZK energies Ep ~ 1020 eV, which can lead to a flux at Earth comparable to that observed by large EAS arrays such as Auger. The semi-relativistic outflows inferred in GRB-related hypernovae are also likely sources of somewhat lower energy cosmic rays. Leptonic processes, such as synchrotron and inverse Compton, as well as hadronic processes, can lead to GeV-TeV gamma-rays measurable by GLAST, AGILE, or ACTs, providing useful probes of the burst physics and model parameters. Photo-meson interactions also produce neutrinos at energies ranging from sub-TeV to EeV, which will be probed with forthcoming experiments such as IceCube, ANITA and KM3NeT. This would provide information about the fundamental interaction physics, the acceleration mechanism, the nature of the sources and their environment.

scholarly journals Detection of TeV Gamma Rays from SN1006

1998 ◽  
Vol 188 ◽  
pp. 121-124 ◽  
Author(s):  
Toru Tanimori
Keyword(s):  
Magnetic Field ◽  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Shock Acceleration ◽  
Emission Region ◽  
X Ray ◽  
High Energy Electrons ◽  
Tev Gamma Rays ◽  
The Magnetic Field

In spite of the recent progress of high energy gamma-ray astronomy, there still remains quite unclear and important problem about the origin of cosmic rays. Supernova remnants (SNRs) are the favoured site for cosmic rays up to 1016 eV, as they satisfy the requirements such as an energy input rate. But direct supporting evidence is sparse. Recently intense non-thermal X-ray emission from the rims of the Type Ia SNR SN1006 (G327.6+14.6) has been observed by ASCA (Koyama et al. 1995)and ROSAT (Willingale et al. 1996), which is considered, by attributing the emission to synchrotron radiation, to be strong evidence of shock acceleration of high energy electrons up to ~100 TeV. If so, TeV gamma rays would also be expected from inverse Compton scattering (IC) of low energy photons (mostly attributable to the 2.7 K cosmic background photons) by these electrons. By assuming the magnetic field strength (B) in the emission region of the SNR, several theorists (Pohl 1996; Mastichiadis 1996; Mastichiadis & de Jager 1996; Yoshida & Yanagita 1997) calculated the expected spectra of TeV gamma rays using the observed radio/X-ray spectra. Observation of TeV gamma rays would thus provide not only the further direct evidence of the existence of very high energy electrons but also the another important information such as the strength of the magnetic field and diffusion coefficient of the shock acceleration. With this motivation, SN1006 was observed by the CANGAROO imaging air Cerenkov telescope in 1996 March and June, also 1997 March and April.

scholarly journals Ultra-high energy cosmic rays and prompt TeV gamma rays from gamma ray bursts

Pramana ◽  
2004 ◽  
Vol 62 (3) ◽  
pp. 789-792
Author(s):  
Pijushpani Bhattacharjee ◽  
Nayantara Gupta
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Tev Gamma Rays

scholarly journals A Search for Correlations of TeV Gamma Rays with Ultra–High‐Energy Cosmic Rays

2003 ◽  
Vol 586 (2) ◽  
pp. 1232-1237 ◽  
Author(s):  
C. W. Akerlof ◽  
S. Biller ◽  
P. Boyle ◽  
J. Buckley ◽  
D. A. Carter‐Lewis ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Tev Gamma Rays

scholarly journals Cosmic rays, neutrinos, and GeV-TeV gamma rays from starburst galaxy NGC 4945

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
E. Aguilar-Ruiz ◽  
N. Fraija ◽  
Jagdish C. Joshi ◽  
A. Galvan-Gamez ◽  
J. A. de Diego
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Starburst Galaxy ◽  
Tev Gamma Rays

Propagation of cosmic rays and their secondaries in the intracluster medium

2020 ◽  
Vol 15 (S359) ◽  
pp. 178-179
Author(s):  
Saqib Hussain ◽  
Rafael Alves Batista ◽  
Elisabete Maria de Gouveia Dal Pino ◽  
Klaus Dolag
Keyword(s):  
Cosmic Rays ◽  
Gamma Rays ◽  
Intergalactic Medium ◽  
Three Dimensional ◽  
High Energy ◽  
Intracluster Medium ◽  
High Energy Cosmic Rays ◽  
Test Particles

AbstractWe present results of the propagation of high-energy cosmic rays (CRs) and their secondaries in the intracluster medium (ICM). To this end, we employ three-dimensional cosmological magnetohydrodynamical simulations of the turbulent intergalactic medium to explore the propagation of CRs with energies between 1014 and 1019 eV. We study the interaction of test particles with this environment considering all relevant electromagnetic, photohadronic, photonuclear, and hadronuclear processes. Finally, we discuss the consequences of the confinement of high-energy CRs in clusters for the production of gamma rays and neutrinos.

Search for TeV Gamma-Rays from 3EG J1234-1318 with the Cangaroo-II Telescope

2005 ◽  
Vol 297 (1-4) ◽  
pp. 327-334 ◽  
Author(s):  
Takahiro Hattori ◽  
Kyoshi Nishijima
Keyword(s):  
Gamma Rays ◽  
Tev Gamma Rays
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