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• W2022119466 abstract "The optical and near-IR emission from some classes of supernovae (SNe), including Type IIn and possibly some super-luminous SNe, is likely powered by a collision between the SN ejecta and dense circumstellar material (CSM). We argue that for a range of CSM masses and their radii, a collisionless shock can form, allowing for efficient cosmic ray (CR) acceleration. We show that pp collisions between these newly accelerated CRs and the CSM leads to not only gamma rays but also secondary electrons and positrons that radiate synchrotron photons in the high-frequency radio bands. Our estimates imply that various facilities including the Jansky Very Large Array (and the Atacama Large Millimeter/submillimetre Array (ALMA) may observe such SNe at Gpc distances by followup observations in months-to-years, although the detectability strongly depends on the CSM density as well as observed frequency. Detecting this signal would give us a unique probe of CR acceleration at early times, and even non-detections can put interesting limits on the possibility of CR ion acceleration. Following our previous work, we also show that GeV gamma rays can escape from the system without severe attenuation, encouraging point-source and stacking analyses with Fermi. We provide recipes for diagnosing interaction-powered SN scenario with multi-messenger (neutrino and gamma-ray) observations." @default.
• W2022119466 created "2016-06-24" @default.
• W2022119466 creator A5007068870 @default.
• W2022119466 creator A5057861867 @default.
• W2022119466 creator A5078910984 @default.
• W2022119466 date "2014-04-09" @default.
• W2022119466 modified "2023-10-17" @default.
• W2022119466 title "Probing cosmic ray ion acceleration with radio-submm and gamma-ray emission from interaction-powered supernovae" @default.
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• W2022119466 doi "https://doi.org/10.1093/mnras/stu384" @default.
• W2022119466 hasPublicationYear "2014" @default.
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