نتایج جستجو برای: cosmic ray propagation
تعداد نتایج: 429239 فیلتر نتایج به سال:
Positrons from particle dark-matter annihilation in the Galactic halo: Propagation Green’s functions
We calculate the propagation of positrons from dark-matter particle annihilation in the Galactic halo in different models of the dark matter halo distribution using our three-dimensional code, and present fits to our numerical propagation Green’s functions. We show that the Green’s functions are not very sensitive to the dark matter distribution for the same local dark matter energy density. We...
If supernova remnants (SNRs) are the sites of cosmic-ray acceleration, the associated nuclear interactions should result in observable fluxes of TeV gamma-rays from the nearest SNRs. Measurements of the gamma-ray flux from six nearby, radio-bright, SNRs have been made with the Whipple Observatory gamma-ray telescope. No significant emission has been detected and upper limits on the >300 GeV flu...
Abstract We propose a machine learning method to investigate the propagation of cosmic rays based on precisely measured spectra primary and secondary ray nuclei Li, Be, B, C, O from AMS-02, ACE, Voyager-1. train two convolutional neural networks. One network learns how infer source parameters energy rays, other network, which is similar former, has flexibility learn data with added artificial f...
In this talk I present resent results on high energy cosmic rays, including energy spectra, composition and the study of arrival directions of cosmic ray primaries. Some related results in gamma-ray astronomy and selected recent advances in theory are also covered. c ⃝ Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. The ques...
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