Double “acct”: A Distinct Double-peaked Supernova Matching Pulsational Pair Instability Models

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dc.article.numberL41
dc.catalogadordfo
dc.contributor.authorAngus, C.R.
dc.contributor.authorWoosley, S.E.
dc.contributor.authorFoley, R.J.
dc.contributor.authorNicholl, M.
dc.contributor.authorVillar, V.A.
dc.contributor.authorTaggart, K.
dc.contributor.authorPursiainen, M.
dc.contributor.authorRamsden, P.
dc.contributor.authorSrivastav, S.
dc.contributor.authorStevance, H.F.
dc.contributor.authorMoore, T.
dc.contributor.authorAuchettl, K.
dc.contributor.authorHoogendam, W.B.
dc.contributor.authorKhetan, N.
dc.contributor.authorYadavalli, S.K.
dc.contributor.authorDimitriadis, G.
dc.contributor.authorGagliano, A.
dc.contributor.authorSiebert, M.R.
dc.contributor.authorAamer, A.
dc.contributor.authorBoer, T.D.
dc.contributor.authorChambers, K.C.
dc.contributor.authorClocchiatti García, Alejandro
dc.contributor.authorCoulter, D.A.
dc.contributor.authorDrout, M.R.
dc.contributor.authorFarias, D.
dc.contributor.authorFulton, M.D.
dc.contributor.authorGall, C.
dc.contributor.authorGao, H.
dc.contributor.authorIzzo, L.
dc.contributor.authorJones, D.O.
dc.contributor.authorLin, C.-C.
dc.contributor.authorMagnier, E.A.
dc.contributor.authorNarayan, G.
dc.contributor.authorRamirez-Ruiz, E.
dc.contributor.authorRansome, C.L.
dc.contributor.authorRest, A.
dc.contributor.authorSmartt, S.J.
dc.contributor.authorSmith, K.W.
dc.date.accessioned2025-11-20T14:25:17Z
dc.date.available2025-11-20T14:25:17Z
dc.date.issued2024
dc.description.abstractWe present multiwavelength data of SN 2020acct, a double-peaked stripped-envelope supernova (SN) in NGC 2981 at ∼150 Mpc. The two peaks are temporally distinct, with maxima separated by 58 rest-frame days and a factor of 20 reduction in flux between. The first is luminous (Mr = −18.00 ± 0.02 mag) and blue (g − r = 0.27 ± 0.03 mag) and displays spectroscopic signatures of interaction with hydrogen-free circumstellar material. The second peak is fainter (Mr = −17.29 ± 0.03 mag) and has some spectroscopic similarities to an evolved stripped-envelope SN, with strong forbidden [Ca ii] and [O ii] features. No other known double-peaked SN exhibits a light curve similar to that of SN 2020acct. We find the likelihood of two individual SNe occurring in the same star-forming region within that time to be highly improbable, while an implausibly fine-tuned configuration would be required to produce two SNe from a single binary system. We find that the peculiar properties of SN 2020acct match models of pulsational pair instability (PPI), in which the initial peak is produced by collisions of shells of ejected material, shortly followed by core collapse. Pulsations from a star with a 72 M⊙ helium core provide an excellent match to the double-peaked light curve. The local galactic environment has a metallicity of 0.4 Z⊙, a level where massive single stars are not expected to retain enough mass to encounter the PPI. However, late binary mergers or a low-metallicity pocket may allow the required core mass. We measure the rate of SN 2020acct-like events to be <3.3 × 10−8 Mpc−3 yr−1 at z = 0.07, or <0.1% of the total core-collapse SN rate.
dc.description.funderEotvos Lorand University
dc.description.funderCanada Research Chairs Program
dc.description.funderUniversity of Hawaii
dc.description.funderUniversity of Illinois Urbana-Champaign
dc.description.funderUniversity of Wisconsin at Milwaukee
dc.description.funderWeizmann Institute for Science
dc.description.funderSTScI postdoctoral fellowship
dc.description.funderMax Planck Institute for Astronomy
dc.description.funderESA
dc.description.funderCenter for AstroPhysical Surveys
dc.description.funderIN2P3
dc.description.funderUniversity of Edinburgh
dc.description.funderW. M. Keck Foundation
dc.description.funderJohns Hopkins University
dc.description.funderDeutsches Elektronen-Synchrotron and Humboldt University
dc.description.funderFundamental Interactions
dc.description.funderUniversity of Toronto
dc.description.funderLos Alamos National Laboratory
dc.description.funderMax Planck Society
dc.description.funderCaltech
dc.description.funderNational Central University of Taiwan
dc.description.funderTrinity College Dublin
dc.description.funderDOE
dc.description.funderDurham University
dc.description.funderLawrence Livermore National Laboratories
dc.description.funderUniversity of Maryland
dc.description.funderIPAC
dc.description.funderNSF A.I. Institute for Artificial Intelligence
dc.description.funderQueen's University Belfast
dc.description.funderDavid and Lucile Packard Foundation
dc.description.funderResearch and Innovation Fellowship
dc.description.funderHarvard-Smithsonian Center for Astrophysics
dc.description.funderPan-STARRS Project Office
dc.description.funderUniversity of Washington
dc.description.funderMax Planck Institute for Extraterrestrial Physics
dc.description.funderUK Space Agency
dc.description.funderUK
dc.description.funderNASA
dc.description.funderDepartment of Physics at the University of Illinois, Urbana-Champaign
dc.description.funderNSF
dc.description.funderSTScI
dc.description.funderNational Science Foundation
dc.description.funderCharles Simonyi
dc.description.funderGordon and Betty Moore Foundation
dc.description.funderANID
dc.description.funderEuropean Union's Horizon 2020 research and innovation program
dc.description.funderAustralian Research Council
dc.description.funderSTFC
dc.description.funderRoyal Society
dc.description.funderHeising-Simons Foundation
dc.description.funderERC
dc.description.funderVILLUM FONDEN
dc.description.funderNSERC
dc.fechaingreso.objetodigital20-11-2025
dc.fuente.origenSCOPUS
dc.identifier.doi10.3847/2041-8213/ad9264
dc.identifier.eissn2041-8213
dc.identifier.issn2041-8205
dc.identifier.scopusidSCOPUS_ID:85212538877
dc.identifier.urihttps://doi.org/10.3847/2041-8213/ad9264
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/107061
dc.identifier.wosidWOS:001380543900001
dc.information.autorucInstituto de Astrofísica; Clocchiatti Garcia, Alejandro; 0000-0003-3068-4258; 100500
dc.language.isoen
dc.nota.accesoContenido completo
dc.revistaAstrophysical Journal Letters
dc.rightsAcceso abierto
dc.rights.licenseAtribución/Reconocimiento 4.0 Internacional
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleDouble “acct”: A Distinct Double-peaked Supernova Matching Pulsational Pair Instability Models
dc.typeartículo
dc.volumen977
sipa.codpersvinculados100500
sipa.trazabilidadSCOPUS;2025-01-05
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