搜索结果: 1-15 共查到“知识库 天文学 Gamma rays”相关记录15条 . 查询时间(0.058 秒)
CANGAROO-III observation of TeV gamma rays from the unidentified gamma-ray source HESS J1614-518
CANGAROO-III observation unidentified gamma-ray source HESS J1614-518
2011/10/12
We report the detection, with the CANGAROO-III imaging atmospheric Cherenkov telescope array, of a very high energy gamma-ray signal from the unidentified gamma-ray source HESS J1614-518, which was di...
A Model Independent Method to Study Dark Matter induced Leptons and Gamma rays
A Model Independent Method to Study Dark Matter induced Leptons and Gamma rays
2011/10/17
We propose a novel method to directly determine dark matter induced electron/positron spectrum at the source from experimental measurements at the earth, without reference to specific particle physics...
A possible approach to three-dimensional cosmic-ray propagation in the Galaxy IV. Electrons and electron-induced gamma-rays
three-dimensional cosmic-ray propagation the Galaxy IV. Electrons
2011/1/11
Based on the diffusion-halo model for cosmic-ray (CR) propagation, including stochastic reacceleration due to collisions with hydromagnetic turbulence, we study the behavior of the electron component ...
A leading hypothesis for the nature of the elusive dark matter are ther-mally produced, weakly interacting massive particles that arise in many theo-ries beyond the standard model of particle physics.
Gamma-rays from SS~433 and its interaction with the W50 nebula
Gamma-rays observations — binaries general — X-rays binaries — stars
2010/11/12
We investigate the production of gamma-rays in the inner regions of SS 433 and in its interaction between its jets and the W50 nebula. We estimate the VHE emission that can be generated within the jet...
Galactic sources of E>100 GeV gamma-rays seen by Fermi telescope
Gamma rays general Galaxy disk Surveys
2010/11/9
Aims. We perform a search for sources of-rays with energies E > 100 GeV at low Galactic latitudes jbj < 10 using the data of Fermi telescope.
Detectability of ultrahigh energy cosmic ray signatures in gamma rays
gamma ray emission ultrahigh energy cosmic rays extragalactic magnetic fields propagation
2010/11/10
The injection of ultra-high energy cosmic rays in the intergalactic medium leads to the production of a GeV-TeV gamma-ray halo centered on the source location, through the production of a high electro...
Gamma-rays from Pulsar Wind Nebulae in Starburst galaxies (HEAD 2010)
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/29
Recently, two nearby prominent starburst galaxies, M82 and NGC253, have been detected as point-like sources with gamma-ray telescopes at TeV energies [1] [2]. It has been claimed that these detections...
Gamma-rays from pulsar wind nebulae in starburst galaxies
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/28
Recently, gamma ray emission at TeV energies has been detected from the starburst galaxies NGC253 [1] and M82 [2].
Searching for Needles in Haystacks - Using the Fermi/GBM to find GRB gamma-rays with the Fermi/LAT Detector
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/27
From the launch of the Fermi Gamma-ray Space Telescope to July 9, 2010, the Gamma-ray Burst Monitor (GBM) has detected 497 probable GRB events. Twenty-two of these satisfy the simultaneous requirement...
Searching for Needles in Haystacks - Looking for GRB gamma-rays with the Fermi/LAT Detector
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/27
Since the launch of the Fermi Gamma-ray Space Telescope on June 11, 2008, 55 gamma-ray bursts (GRBs) have been observed at coordinates that fall within 66^\circ of the Fermi Large Area Telescope (LAT)...
Modeling TeV gamma-rays from LS 5039: An active OB star at the extreme
High Energy Astrophysical Phenomena (astro-ph.HE) Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
Perhaps the most extreme examples of "Active OB stars" are the subset of high-mass X-ray binaries -- consisting of an OB star plus compact companion -- that have recently been observed by Fermi and gr...
X-rays and Gamma-rays from Cataclysmic Variables: The example case of Intermediate Polar V1223 Sgr
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/23
The accretion of matter onto intermediate polar White Dwarfs (IPWDs) seems to provide attractive conditions for acceleration of particles to high energies in a strongly magnetized turbulent region at ...
Gamma rays and neutrinos from dark matter annihilation in galaxy clusters
dark matter Gamma rays galaxy clusters
2010/3/9
The $\gamma$-ray and neutrino emissions from dark matter (DM) annihilation in galaxy clusters are studied. After about one year operation of Fermi-LAT, several nearby clusters are reported with string...
The field of Very High Energy (VHE) gamma ray astronomy
using the Atmospheric Cerenkov Technique has entered an interesting
phase with detection of various galactic and extragalactic sources. Among
...