搜索结果: 1-15 共查到“理学 gamma rays”相关记录23条 . 查询时间(0.067 秒)
Help astronomers find elusive muons disguised as gamma rays
astronomers muons disguised gamma rays
2017/3/30
A new citizen science project, led by astronomers at the University of Minnesota, is asking for help from the public to identify and categorize hundreds of thousands of ring patterns within images pro...
Galactic center's gamma rays unlikely to originate from dark matter,evidence shows
Galactic center gamma rays dark matter
2016/2/23
Bursts of gamma rays from the center of our galaxy are not likely to be signals of dark matter but rather other astrophysical phenomena such as fast-rotating stars called millisecond pulsars, accordin...
Highly-detailed radio-telescope images have pinpointed the locations where a stellar explosion called a nova emitted gamma rays, the most energetic form of electromagnetic waves. The discovery reveale...
Observation of thundercloud-related gamma rays and neutrons in Tibet
Observation of thundercloud-related gamma rays neutrons Tibet Geophysics
2012/4/24
During the 2010 rainy season in Yangbajing (4300 m above sea level) in Tibet, China, a long-duration count enhancement associated with thunderclouds was detected by a solar neutron telescope and neutr...
Propagation of gamma rays and production of free electrons in air
Propagation of gamma rays production of free electrons Plasma Physics
2012/4/20
A new concept of remote detection of concealed radioactive materials has been recently proposed \cite{Gr.Nusin.2010}-\cite{NusinSprangle}. It is based on the breakdown in air at the focal point of a h...
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...
Ultra-strong laser pulses: streak-camera for gamma-rays via pair production and quantum radiative reaction
gamma-rays zeptosecond pulses strong laser field electron-positron pair production radiation reaction
2011/8/5
Abstract: We show that a strong laser pulse combined with a strong x-ray pulse can be employed in a detection scheme for characterizing high-energy $\gamma$-ray pulses down to the zeptosecond timescal...
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].