scholarly journals Signatures of Recent Cosmic-Ray Acceleration in the High-Latitude gamma-Ray Sky

2021 ◽  
Author(s):  
Gudlaugur Johannesson ◽  
Troy Porter
Keyword(s):  
High Latitude ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Cosmic Ray Acceleration

scholarly journals Magnetic reconnection, Cosmic Ray Acceleration and Gamma-Ray emission around Black Holes and Relativistic Jets

2019 ◽  
Author(s):  
Elisabete De Gouveia Dal Pino ◽  
Rafael Alves Batista ◽  
Luis H.S. Kadowaki ◽  
Grzergorz Kowal ◽  
Tania E. Medina-Torrejon ◽  
...  
Keyword(s):  
Black Holes ◽  
Magnetic Reconnection ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Relativistic Jets ◽  
Cosmic Ray Acceleration ◽  
Gamma Ray Emission

scholarly journals Gamma-Ray Bursts at TeV Energies: Observational Status

Galaxies ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 7
Author(s):  
Koji Noda ◽  
Robert Daniel Parsons
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
High Energy Gamma ◽  
Cosmic Ray Acceleration ◽  
Very High Energy ◽  
Energy Gamma ◽  
Observational Status ◽  
Very High

Gamma-ray bursts (GRBs) are some of the most energetic events in the Universe and are potential sites of cosmic ray acceleration up to the highest energies. GRBs have therefore been a target of interest for very high energy gamma-ray observatories for many years, leading to the recent discovery of a number of bursts with photons reaching energies above 100 GeV. We summarize the GRB observational campaigns of the current generation of very high energy gamma-ray observatories as well as describing the observations and properties of the GRBs discovered so far. We compare the properties of the very high energy bursts to the total GRB distribution and make predictions for the next generation of very high energy gamma-ray observations.

Particle acceleration at forward and reverse shocks in SNRs

2018 ◽  
Vol 27 (10) ◽  
pp. 1844023 ◽  
Author(s):  
Vladimir Zirakashvili
Keyword(s):  
Supernova Remnants ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Field Amplification ◽  
Streaming Instability ◽  
Cosmic Ray Acceleration ◽  
Astrophysical Neutrinos ◽  
Astrophysical Shocks ◽  
Accelerated Particles

Cosmic ray acceleration by astrophysical shocks in supernova remnants is briefly reviewed. Results of numerical modeling taking into account the magnetic field amplification by streaming instability and the shock modification are presented. Nonthermal emission produced by accelerated particles in old supernova remnants is compared with available data of modern radio, X-ray and gamma-ray astronomies. It is also shown that high-energy neutrinos produced in young supernova remnants of Type IIn extragalactic supernova can explain the recent IceCube detection of astrophysical neutrinos.

scholarly journals Cosmic-ray acceleration and gamma-ray signals from radio supernovæ

2014 ◽  
Vol 256-257 ◽  
pp. 94-100 ◽  
Author(s):  
A. Marcowith ◽  
M. Renaud ◽  
V. Dwarkadas ◽  
V. Tatischeff
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
Cosmic Ray Acceleration

scholarly journals The high-latitude distribution of Galactic gamma rays and possible evidence for a gamma-ray halo

1985 ◽  
Vol 106 ◽  
pp. 235-236
Author(s):  
A. W. Strong
Keyword(s):  
Gamma Rays ◽  
High Latitude ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
The South ◽  
Cosmic Ray Interactions ◽  
Latitude Distribution ◽  
Gamma Ray Emission ◽  
Almost All ◽  
North Galactic

During its 6.7-year lifetime the COS-B experiment included about 15 months of observations towards latitudes |b|> 20° and covered almost all latitudes from the South to North galactic poles. Studies comparing the local gamma-ray emission with the distribution of gas (Lebrun et al. 1982, Strong et al. 1982) have so far been limited to 10°<|b|< 20°, where the correlation is found to be fairly good and the structured emission can therefore be attributed mainly to cosmic-ray interactions with gas. The extension of this type of analysis to higher latitudes is now possible using the COS-B database.

scholarly journals Some Aspects of Galactic Cosmic Ray Acceleration

2005 ◽  
Vol 13 ◽  
pp. 24-29
Author(s):  
Yousaf Mahmood Butt
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
Medium Energy ◽  
Cosmic Ray Acceleration ◽  
Energy Gamma ◽  
On Line ◽  
Galactic Cosmic Ray

AbstractI give a synopsis of two aspects of the Galactic Cosmic Ray (GCR) acceleration problem: the importance of the medium energy gamma-ray window, and several specific astrophysical sources which merit further investigation. NOTE: figures may be found in the on-line version only: astro-ph/0309758.

scholarly journals Gamma-ray signatures of cosmic ray acceleration, propagation, and confinement in the era of CTA

2013 ◽  
Vol 43 ◽  
pp. 276-286 ◽  
Author(s):  
F. Acero ◽  
A. Bamba ◽  
S. Casanova ◽  
E. de Cea ◽  
E. de Oña Wilhelmi ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
Cosmic Ray Acceleration

scholarly journals First Observations of SN 1604 (Kepler's Supernova)

2021 ◽  
Author(s):  
Alessandro De Angelis ◽  
selenia broccio
Keyword(s):  
Milky Way ◽  
Gamma Ray ◽  
Cosmic Ray ◽  
Optical Observations ◽  
Naked Eye ◽  
The Earth ◽  
Cosmic Ray Acceleration ◽  
History Of ◽  
Recorded Data ◽  
The Subject

A supernova close enough to the Earth is a spectacular event: it can appear as a \new star" as luminous as Venus, or even more, visible for several days. The rate of Galactic supernovae is expected to be of about one in 30 years, with a fraction visible at naked eye; however in all the history of human civilization only seven supernovae in the Milky Way have been reported, the last two (1572 and 1604) during Galilei's life. The supernova of 1604, today called Kepler's Supernova, was observed by Galilei, Kepler and other astronomers in Europe, Korea, and China. Like the supernova SN1572, today called Tycho's supernova, it has been the subject of extensive studies, and inspired observational measurements and philosophical considerations on the nature of the heavens. The remnant of SN1604 has been indicated by recent X- and gamma-ray data to be a likely site of cosmic ray acceleration. The first recorded data of optical observations, together with new data, can still tell us a lot about the early evolution of this supernova.

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