Light Curves and Event Rates of Axion Instability Supernovae

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dc.contributor.authorMori, Kanjien
dc.contributor.authorMoriya, Takashi J.en
dc.contributor.authorTakiwaki, Tomoyaen
dc.contributor.authorKotake, Keien
dc.contributor.authorHoriuchi, Shunsakuen
dc.contributor.authorBlinnikov, Sergei I.en
dc.date.accessioned2023-04-07T14:59:01Zen
dc.date.available2023-04-07T14:59:01Zen
dc.date.issued2023-01en
dc.description.abstractIt was recently proposed that exotic particles can trigger a new stellar instability that is analogous to the e (-) e (+) pair instability if they are produced and reach equilibrium in the stellar plasma. In this study, we construct axion instability supernova (AISN) models caused by the new instability to predict their observational signatures. We focus on heavy axion-like particles (ALPs) with masses of similar to 400 keV-2 MeV and coupling with photons of g ( a gamma ) similar to 10(-5) GeV-1. It is found that the Ni-56 mass and the explosion energy are significantly increased by ALPs for a fixed stellar mass. As a result, the peak times of the light curves of AISNe occur earlier than those of standard pair-instability supernovae by 10-20 days when the ALP mass is equal to the electron mass. Also, the event rate of AISNe is 1.7-2.6 times higher than that of pair-instability supernovae, depending on the high mass cutoff of the initial mass function.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.3847/1538-4357/acaaffen
dc.identifier.eissn1538-4357en
dc.identifier.issue1en
dc.identifier.other12en
dc.identifier.urihttp://hdl.handle.net/10919/114444en
dc.identifier.volume943en
dc.language.isoenen
dc.publisherIOP Publishingen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectPulsational pair-instabilityen
dc.subjectinitial mass functionen
dc.subjectstaren
dc.subjectsignatureen
dc.titleLight Curves and Event Rates of Axion Instability Supernovaeen
dc.title.serialAstrophysical Journalen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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