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Upper limits on very-high-energy gamma-ray emission from core-collapse supernovae observed with HESS
North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa..
Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany.;Dublin Inst Adv Studies, 31 Fitzwilliam Pl, Dublin 2, Ireland.;RAU, High Energy Astrophys Lab, 123 Hovsep Emin St, Yerevan 0051, Armenia..
Max Planck Inst Kernphys, POB 103980, D-69029 Heidelberg, Germany..
Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France..
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2019 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 626, p. 1-11, article id A57Article in journal (Refereed) Published
Abstract [en]

Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurable gamma-ray emission. We searched for gamma-ray emission from ten super- novae observed with the High Energy Stereoscopic System (H.E.S.S.) within a year of the supernova event. Nine supernovae were observed serendipitously in the H.E.S.S. data collected between December 2003 and December 2014, with exposure times ranging from 1.4 to 53 h. In addition we observed SN 2016adj as a target of opportunity in February 2016 for 13 h. No significant gamma-ray emission has been detected for any of the objects, and upper limits on the >1 TeV gamma-ray flux of the order of similar to 10(-13) cm(-)(2)s(-1) are established, corresponding to upper limits on the luminosities in the range similar to 2 x 10(39) to similar to 1 x 10(42) erg s(-1). These values are used to place model-dependent constraints on the mass-loss rates of the progenitor stars, implying upper limits between similar to 2 x 10(-5) and similar to 2 x 10(-3) M-circle dot yr(-1) under reasonable assumptions on the particle acceleration parameters.

Place, publisher, year, edition, pages
EDP Sciences, 2019. Vol. 626, p. 1-11, article id A57
Keywords [en]
gamma rays: general, supernovae: general, cosmic rays
National Category
Astronomy, Astrophysics and Cosmology
Research subject
Physics, Astroparticle Physics
Identifiers
URN: urn:nbn:se:lnu:diva-86856DOI: 10.1051/0004-6361/201935242ISI: 000471213000003OAI: oai:DiVA.org:lnu-86856DiVA, id: diva2:1337595
Available from: 2019-07-16 Created: 2019-07-16 Last updated: 2019-07-16Bibliographically approved

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Becherini, YvonneBylund, TomasPunch, MichaelSenniappan, Mohanraj

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Becherini, YvonneBylund, TomasPunch, MichaelSenniappan, Mohanraj
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Department of Physics and Electrical Engineering
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