Neutrinos from newborn pulsar winds hitting supernova ejecta could be detected from a galactic source by IceCube if B/P^2 exceeds ~0.003, with parameter constraints and a detectable diffuse flux for next-generation telescopes.
Interacting supernovae as high-energy multimessenger transients
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abstract
Multiwavelength observations have revealed that dense, confined circumstellar material (CCSM) commonly exists in the vicinity of supernova (SN) progenitors, suggesting enhanced mass losses years to centuries before their core collapse. Interacting SNe, which are powered or aided by interaction with the CCSM, are considered to be promising high-energy multimessenger transient sources. We present detailed results of broadband electromagnetic emission, following the time-dependent model proposed in the previous work on high-energy SN neutrinos [K. Murase, New prospects for detecting high-energy neutrinos from nearby supernovae, Phys. Rev. D 97, 081301(R) (2018)]. We investigate electromagnetic cascades in the presence of Coulomb losses, including inverse-Compton and synchrotron components that significantly contribute to MeV and high-frequency radio bands, respectively. We also discuss the application to SN 2023ixf.
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Exploring the properties of newborn pulsars with high-energy neutrinos
Neutrinos from newborn pulsar winds hitting supernova ejecta could be detected from a galactic source by IceCube if B/P^2 exceeds ~0.003, with parameter constraints and a detectable diffuse flux for next-generation telescopes.