Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Yves A. Gallant"'
Autor:
Yves A. Gallant
Publikováno v:
Nucl.Part.Phys.Proc.
2nd Conference on Cosmic Ray Origin-beyond the standard models
2nd Conference on Cosmic Ray Origin-beyond the standard models, Sep 2016, San Vito di Cadore, Italy. pp.106-113, ⟨10.1016/j.nuclphysbps.2018.07.017⟩
2nd Conference on Cosmic Ray Origin-beyond the standard models
2nd Conference on Cosmic Ray Origin-beyond the standard models, Sep 2016, San Vito di Cadore, Italy. pp.106-113, ⟨10.1016/j.nuclphysbps.2018.07.017⟩
Pulsars, and more precisely their wind nebulae, are perhaps the most likely astrophysical sources of high-energy cosmic-ray electrons and especially positrons, and in particular of the excess positronic component above ∼20 GeV measured by PAMELA, F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30d6a2caa60000cc3f1e1776bf654178
https://doi.org/10.1016/j.nuclphysbps.2018.07.017
https://doi.org/10.1016/j.nuclphysbps.2018.07.017
Autor:
Yves A. Gallant
Publikováno v:
Astrophysics and Space Science. 309:197-202
The H.E.S.S. array of imaging Cherenkov telescopes has discovered a number of previously unknown gamma-ray sources in the very high energy (VHE) domain above 100 GeV. The good angular resolution of H.E.S.S. (~0.1 degree per event), as well as its sen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::687691e60d46807943198c5d41e65f7f
https://doi.org/10.1007/s10509-007-9430-y
https://doi.org/10.1007/s10509-007-9430-y
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 328:393-408
We consider the acceleration of charged particles near ultra-relativistic shocks, with Lorentz factor Gamma_s >> 1. We present simulations of the acceleration process and compare these with results from semi-analytical calculations. We show that the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7176e99949388663b7331c46746b60c
https://doi.org/10.1046/j.1365-8711.2001.04851.x
https://doi.org/10.1046/j.1365-8711.2001.04851.x
Publikováno v:
Astronomy & Astrophysics. 380:309-317
A spherically symmetric model is presented for the interaction of a pulsar wind with the associated supernova remnant. This results in a pulsar wind nebula whose evolution is coupled to the evolution of the surrounding supernova remnant. This evoluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae4faa0c7e6a6fdb9cce2c56b0a43dbf
https://doi.org/10.1051/0004-6361:20011437
https://doi.org/10.1051/0004-6361:20011437
Publikováno v:
International Astronomical Union Colloquium. 128:78-85
The shock termination of a relativistic magnetohydrodynamic wind from a pulsar is the most interesting and viable model for the excitation of the synchrotron sources observed in plerionic supernova remnants. We have studied the structure of relativis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c11011552a709ac266c9d5c629edef3
https://doi.org/10.1017/s0002731600154782
https://doi.org/10.1017/s0002731600154782
Autor:
Yves A. Gallant
Publikováno v:
The Multi-Messenger Approach to High-Energy Gamma-Ray Sources ISBN: 9781402061172
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6924980951f6cc8dd7580f6e7c9a9a45
https://doi.org/10.1007/978-1-4020-6118-9_30
https://doi.org/10.1007/978-1-4020-6118-9_30
Publikováno v:
Scopus-Elsevier
Astronomy & Astrophysics, 397, 913-920
Astronomy & Astrophysics, 397, 913-920
Hydrodynamical simulations are presented of a pulsar wind emitted by a supersonically moving pulsar. The pulsar moves through the interstellar medium or, in the more interesting case, through the supernova remnant created at its birth event. In both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b84825a6a97721ff96b3c567e6725f7
Autor:
Yves A. Gallant
Publikováno v:
Relativistic Flows in Astrophysics ISBN: 9783540435181
I review the current status of Fermi acceleration theory at relativistic shocks. I first discuss the relativistic shock jump conditions, then describe the nonrelativistic Fermi mechanism and the differences introduced by relativistic flows. I present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c199bce3ef88e094e8bba337d2e26fb
https://doi.org/10.1007/3-540-46025-x_2
https://doi.org/10.1007/3-540-46025-x_2
The cosmic-ray spectrum up to the knee ($E\sim 10^{15}$ eV) is attributed to acceleration processes taking place at the blastwaves which bound supernova remnants. Theoretical predictions give a similar estimate for the maximum energy which can be rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a57e44314a9f3ec563c979e695d44068
http://arxiv.org/abs/astro-ph/0012385
http://arxiv.org/abs/astro-ph/0012385
We examine Fermi-type acceleration at relativistic shocks, and distinguish between the initial boost of the first shock crossing cycle, where the energy gain per particle can be very large, and the Fermi process proper with repeated shock crossings,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d87def16619e679f7e392f6430e37c7
http://arxiv.org/abs/astro-ph/0001509
http://arxiv.org/abs/astro-ph/0001509