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Effect of nearby supernova remnants on local cosmic rays
Bhabha Atomic Research Centre, India.
2007 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 378, no 1, p. 48-54Article in journal (Refereed) Published
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Abstract [en]

We study in detail the effect of different particle release times from sources on the cosmic ray (CR) spectrum below 1015 eV in the Galaxy. We discuss different possible forms of particle injection such as burst-like injection, continuous injection for a finite time, injection from a stationary source and energy-dependent injection. When applied to the nearby known supernova remnants, we find that the observed CR anisotropy data favour the burst-like particle injection model for the CR diffusion coefficient D(E) ∝Ea with a= 0.3 –0.6 in the local region. In this study we have also found that the contribution of the sources G114.3+0.3 and Monogem dominate if the observed anisotropy is a result of the effect of the nearby sources. Further study shows that we should not neglect the contribution of the undetected old sources to the local CR anisotropy.

Place, publisher, year, edition, pages
2007. Vol. 378, no 1, p. 48-54
Keywords [en]
diffusion, cosmic rays, supernova remnants
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-51574DOI: 10.1111/j.1365-2966.2007.11705.xOAI: oai:DiVA.org:lnu-51574DiVA, id: diva2:915336
Available from: 2016-03-29 Created: 2016-03-29 Last updated: 2017-11-30Bibliographically approved

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Thoudam, Satyendra

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