Zobrazeno 1 - 10
of 236
pro vyhledávání: '"Charles D. Dermer"'
Autor:
Charles D. Dermer, Govind Menon
Bright gamma-ray flares observed from sources far beyond our Milky Way Galaxy are best explained if enormous amounts of energy are liberated by black holes. The highest- energy particles in nature--the ultra-high-energy cosmic rays--cannot be confine
Publikováno v:
Journal of High Energy Astrophysics. :29-40
The IceCube collaboration has reported neutrinos with energies between ~30 TeV and a few PeV that are significantly enhanced over the cosmic-ray induced atmospheric background. Viable high-energy neutrino sources must contain very high-energy and ult
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::618c5e37ee626158053994a09667c599
Autor:
Charles D. Dermer, Berrie Giebels
Publikováno v:
Comptes Rendus Physique
Comptes Rendus Physique, 2016, 17, pp.594-616. ⟨10.1016/j.crhy.2016.04.004⟩
Comptes Rendus Physique, 2016, 17, pp.594-616. 〈10.1016/j.crhy.2016.04.004〉
Comptes Rendus Physique, 2016, 17, pp.594-616. ⟨10.1016/j.crhy.2016.04.004⟩
Comptes Rendus Physique, 2016, 17, pp.594-616. 〈10.1016/j.crhy.2016.04.004〉
Active Galactic Nuclei can be copious extragalactic emitters of MeV-GeV-TeV gamma rays, a phenomenon linked to the presence of relativistic jets powered by a super-massive black hole in the center of the host galaxy. Most of gamma-ray emitting active
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b564dce31472f9690cde8338ba6b779
https://hal.archives-ouvertes.fr/hal-01554030
https://hal.archives-ouvertes.fr/hal-01554030
Autor:
Charles D. Dermer
Knowledge of the distant high-energy universe comes from photons, ultra-high energy cosmic rays (UHECRs), high-energy neutrinos, and gravitational waves. The theory of high-energy messengers reviewed here focuses on the extragalactic background light
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64dcd0673f3a3bb6f77ce01a831b2675
The {\gamma}-ray flares from the Crab nebula observed by AGILE and Fermi-LAT reaching GeV energies and lasting several days challenge the standard models for particle acceleration in pulsar wind nebulae, because the radiating electrons have energies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad4f28f820df18bf1077014a41a7651f
Autor:
P. N. Bhat, J. T. Linnemann, J. P. Norris, U. Abeysekara, N. Gehrels, Kirsten Tollefson, T. N. Ukwatta, L. C. Maximon, T. Sakamoto, Kalvir S. Dhuga, A. Eskandarian, Charles D. Dermer, M. Stamatikos, Eda Sonbas, William C. Parke
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 419:614-623
Spectral lag, which is defined as the difference in time of arrival of high and low energy photons, is a common feature in Gamma-ray Bursts (GRBs). Previous investigations have shown a correlation between this lag and the isotropic peak luminosity fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2946ee1e8735644188ead79ce79e047c
https://doi.org/10.1111/j.1365-2966.2011.19723.x
https://doi.org/10.1111/j.1365-2966.2011.19723.x
Autor:
Charles D. Dermer, Govind Menon
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 417:1098-1104
In this paper, we provide exact solutions for the extraction of energy from a rotating black hole via both the electromagnetic Poynting flux and matter currents. By appropriate choice of a radially independent poloidal function Λ(θ), we find soluti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db5237bc5d2ec378ce911bafaf418212
https://doi.org/10.1111/j.1365-2966.2011.19327.x
https://doi.org/10.1111/j.1365-2966.2011.19327.x
Autor:
Charles D. Dermer, Soebur Razzaque
Publikováno v:
The Astrophysical Journal. 724:1366-1372
Fermi Gamma ray Space Telescope measurements of spectra, variability time scale, and maximum photon energy give lower limits to the apparent jet powers and, through gammagamma opacity arguments, the bulk Lorentz factors of relativistic jets. The maxi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d3b96cb3456df80116c18eeda9636d09
https://doi.org/10.1088/0004-637x/724/2/1366
https://doi.org/10.1088/0004-637x/724/2/1366
Publikováno v:
The Open Astronomy Journal. 3:150-155
Fermi ! -ray telescope data of GRB 080916C with ~10 55 erg in apparent isotropic ! -ray energy, show a several second delay between the rise of 100 MeV - GeV radiation compared with keV - MeV radiation. Here we show that synchrotron radiation from co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82b83f161d3ac1925171ded0469fa29b
https://doi.org/10.2174/1874381101003010150
https://doi.org/10.2174/1874381101003010150
Autor:
Justin D. Finke, Charles D. Dermer
Publikováno v:
The Astrophysical Journal. 714:L303-L307
Fermi Gamma-ray Space Telescope observations of the flat spectrum radio quasar 3C 454.3 show a spectral-index change ΔΓ 1.2 ± 0.3 at break energy E br 2.4 ± 0.3 GeV. Such a sharp break is inconsistent with a cooling electron distribution and is p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a449b76628a76942a0bbc8cc03601d12
https://doi.org/10.1088/2041-8205/714/2/l303
https://doi.org/10.1088/2041-8205/714/2/l303