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Population study of Galactic supernova remnants at very high gamma-ray energies with H.E.S.S.

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dc.abstract.enShell-type supernova remnants (SNRs) are considered prime candidates for the acceleration of Galactic cosmic rays (CRs) up to the knee of the CR spectrum at E ≈ 3 × 10<SUP>15</SUP> eV. Our Milky Way galaxy hosts more than 350 SNRs discovered at radio wavelengths and at high energies, of which 220 fall into the H.E.S.S. Galactic Plane Survey (HGPS) region. Of those, only 50 SNRs are coincident with a H.E.S.S source and in 8 cases the very high-energy (VHE) emission is firmly identified as an SNR. The H.E.S.S. GPS provides us with a legacy for SNR population study in VHE γ-rays and we use this rich data set to extract VHE flux upper limits from all undetected SNRs. Overall, the derived flux upper limits are not in contradiction with the canonical CR paradigm. Assuming this paradigm holds true, we can constrain typical ambient density values around shell-type SNRs to n ≤ 7 cm<SUP>-3</SUP> and electron-to-proton energy fractions above 10 TeV to ∊<SUB>ep</SUB> ≤ 5 × 10<SUP>-3</SUP>. Furthermore, comparisons of VHE with radio luminosities in non-interacting SNRs reveal a behaviour that is in agreement with the theory of magnetic field amplification at shell-type SNRs.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorBulik, Tomasz
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dc.contributor.authorYang, R.
dc.contributor.authorZaborov, D.
dc.contributor.authorZacharias, M.
dc.contributor.authorZanin, R.
dc.contributor.authorZdziarski, A. A.
dc.contributor.authorZech, A.
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dc.contributor.authorŻywucka, N.
dc.date.accessioned2024-01-25T17:16:11Z
dc.date.available2024-01-25T17:16:11Z
dc.date.copyright2018-02-14
dc.date.issued2018
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.versionORIGINAL_AUTHOR
dc.description.volume612
dc.identifier.doi10.1051/0004-6361/201732125
dc.identifier.issn0004-6361
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/116532
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2018A&A...612A...3H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofAstronomy and Astrophysics
dc.relation.pagesA3
dc.rightsOther
dc.sciencecloudnosend
dc.titlePopulation study of Galactic supernova remnants at very high gamma-ray energies with H.E.S.S.
dc.typeJournalArticle
dspace.entity.typePublication