Galactic -rays and Cosmic Ray Origin
نویسندگان
چکیده
منابع مشابه
Gamma Ray Astronomy and the Origin of Galactic Cosmic Rays
Diffusive shock acceleration operating at expanding supernova remnant shells is by far the most popular model for the origin of galactic cosmic rays. Despite the general consensus received by this model, an unambiguous and conclusive proof of the supernova remnant hypothesis is still missing. In this context, the recent developments in gamma ray astronomy provide us with precious insights into ...
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It is shown that the relativistic jet, emitted from the center of the Galaxy during its activity, possessed power and energy spectrum of accelerated protons sufficient to explain the current cosmic rays distribution in the Galaxy. Proton acceleration takes place on the light cylinder surface formed by the rotation of a massive black hole carring into rotation the radial magnetic field and the m...
متن کاملThe Origin of Galactic Cosmic Rays
Motivated by recent measurements of the major components of the cosmic radiation around 10 TeV/nucleon and above, we discuss the phenomenology of a model in which there are two distinct kinds of cosmic ray accelerators in the galaxy. Comparison of the spectra of hydrogen and helium up to 100 TeV per nucleon suggests that these two elements do not have the same spectrum of magnetic rigidity over...
متن کاملCosmic-ray Neon, Wolf-rayet Stars, and the Superbubble Origin of Galactic Cosmic Rays
We report the abundances of neon isotopes in the Galactic cosmic rays (GCRs) using data from the Cosmic Ray Isotope Spectrometer (CRIS) aboard the Advanced Composition Explorer (ACE ). These abundances have been measured for seven energy intervals over the energy range of 84 E /M 273MeV nucleon .We have derived the Ne/Ne ratio at the cosmic-ray source using the measured Ne, F, and O abundances ...
متن کاملGalactic modulation of extragalactic cosmic rays: Possible origin of the knee in the cosmic ray spectrum
The existence of the spectral break around ∼ 3 × 10 eV in the cosmic ray spectrum (referred to as the ‘knee’) is one of the biggest questions in cosmic ray astrophysics. At the same time, the origin of cosmic rays above the knee energies (between 10 and 10 eV) is also still unsettled. In this paper, we investigate how the hypothetical extragalactic CRs after modulated by the galactic wind contr...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1975
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/171.3.569