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Constraints on the cosmic ray diffusion coefficient in the W28 region from gamma-ray observations

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arxiv 1009.5291 v1 pith:SQCEP7BC submitted 2010-09-27 astro-ph.HE

classification astro-ph.HE
keywords cosmiccoefficientdiffusiongammaregionremnantsupernovabeen
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GeV and TeV gamma rays have been detected from the supernova remnant W28 and its surroundings. Such emission correlates quite well with the position of dense and massive molecular clouds and thus it is often interpreted as the result of hadronic cosmic ray interactions in the dense gas. Constraints on the cosmic ray diffusion coefficient in the region can be obtained, under the assumption that the cosmic rays responsible for the gamma ray emission have been accelerated in the past at the supernova remnant shock, and subsequently escaped in the surrounding medium. In this scenario, gamma ray observations can be explained only if the diffusion coefficient in the region surrounding the supernova remnant is significantly suppressed with respect to the average galactic one.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 15 citations worldwide. Full citation record

  1. Gamma-ray emission from particle illumination and shock-cloud interaction in the W51 Complex

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    A model in which particles were injected into the W51B molecular cloud for 420 years about 18,000 years ago and stayed confined reproduces LHAASO's ultra-high-energy gamma-ray spectrum of W51, whereas direct SNR-cloud...

  2. The problem of escape: a missing bit in the theory of the origin of cosmic rays

    astro-ph.HE 2026-07 conditional novelty 3.0 of 10

    A review arguing that cosmic-ray escape from sources, near-source regions, and galaxies is a self-regulated nonlinear process that shapes spectra and sets maximum energies, yet is often modeled with ad hoc boundary co...

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