Ground-based and JWST Observations of SN 2022pul. I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova

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dc.contributor.authorSiebert, Matthew R.
dc.contributor.authorKwok, Lindsey A.
dc.contributor.authorJohansson, Joel
dc.contributor.authorJha, Saurabh W.
dc.contributor.authorBlondin, Stephane
dc.contributor.authorDessart, Luc
dc.contributor.authorFoley, Ryan J.
dc.contributor.authorHillier, D. John
dc.contributor.authorLarison, Conor
dc.contributor.authorPakmor, Ruediger
dc.contributor.authorTemim, Tea
dc.contributor.authorAndrews, Jennifer E.
dc.contributor.authorAuchettl, Katie
dc.contributor.authorBadenes, Carles
dc.contributor.authorBarna, Barnabas
dc.contributor.authorBostroem, K. Azalee
dc.contributor.authorBrenner Newman, Max J.
dc.contributor.authorBrink, Thomas G.
dc.contributor.authorBustamante-Rosell, Maria Jose
dc.contributor.authorCamacho-Neves, Yssavo
dc.contributor.authorClocchiatti, Alejandro
dc.contributor.authorCoulter, David A.
dc.contributor.authorDavis, Kyle W.
dc.contributor.authorDeckers, Maxime
dc.contributor.authorDimitriadis, Georgios
dc.contributor.authorDong, Yize
dc.contributor.authorFarah, Joseph
dc.contributor.authorFilippenko, Alexei V.
dc.contributor.authorFloers, Andreas
dc.contributor.authorFox, Ori D.
dc.contributor.authorGarnavich, Peter
dc.contributor.authorGonzalez, Estefania Padilla
dc.contributor.authorGraur, Or
dc.contributor.authorHambsch, Franz-Josef
dc.contributor.authorHosseinzadeh, Griffin
dc.contributor.authorHowell, D. Andrew
dc.contributor.authorHughes, John P.
dc.contributor.authorKerzendorf, Wolfgang E.
dc.contributor.authorLe Saux, Xavier K.
dc.contributor.authorMaeda, Keiichi
dc.contributor.authorMaguire, Kate
dc.contributor.authorMcCully, Curtis
dc.contributor.authorMihalenko, Cassidy
dc.contributor.authorNewsome, Megan
dc.contributor.authorO'Brien, John T.
dc.contributor.authorPearson, Jeniveve
dc.contributor.authorPellegrino, Craig
dc.contributor.authorPierel, Justin D. R.
dc.contributor.authorPolin, Abigail
dc.contributor.authorRest, Armin
dc.contributor.authorRojas-Bravo, Cesar
dc.contributor.authorSand, David J.
dc.contributor.authorSchwab, Michaela
dc.contributor.authorShahbandeh, Melissa
dc.contributor.authorShrestha, Manisha
dc.contributor.authorSmith, Nathan
dc.contributor.authorStrolger, Louis-Gregory
dc.contributor.authorSzalai, Tamas
dc.contributor.authorTaggart, Kirsty
dc.contributor.authorTerreran, Giacomo
dc.contributor.authorTerwel, Jacco H.
dc.contributor.authorTinyanont, Samaporn
dc.contributor.authorValenti, Stefano
dc.contributor.authorVinko, Jozsef
dc.contributor.authorWheeler, J. Craig
dc.contributor.authorYang, Yi
dc.contributor.authorZheng, Weikang
dc.contributor.authorAshall, Chris
dc.contributor.authorDerKacy, James M.
dc.contributor.authorGalbany, Lluis
dc.contributor.authorHoeflich, Peter
dc.contributor.authorHsiao, Eric
dc.contributor.authorde Jaeger, Thomas
dc.contributor.authorLu, Jing
dc.contributor.authorMaund, Justyn
dc.contributor.authorMedler, Kyle
dc.contributor.authorMorrell, Nidia
dc.contributor.authorShappee, Benjamin J.
dc.contributor.authorStritzinger, Maximilian
dc.contributor.authorSuntzeff, Nicholas
dc.contributor.authorTucker, Michael
dc.contributor.authorWang, Lifan
dc.date.accessioned2025-01-20T17:10:24Z
dc.date.available2025-01-20T17:10:24Z
dc.date.issued2024
dc.description.abstractNebular-phase observations of peculiar Type Ia supernovae (SNe Ia) provide important constraints on progenitor scenarios and explosion dynamics for both these rare SNe and the more common, cosmologically useful SNe Ia. We present observations from an extensive ground- and space-based follow-up campaign to characterize SN 2022pul, a super-Chandrasekhar mass SN Ia (alternatively "03fg-like" SN), from before peak brightness to well into the nebular phase across optical to mid-infrared (MIR) wavelengths. The early rise of the light curve is atypical, exhibiting two distinct components, consistent with SN Ia ejecta interacting with dense carbon-oxygen (C/O)-rich circumstellar material (CSM). In the optical, SN 2022pul is most similar to SN 2012dn, having a low estimated peak luminosity (M B = -18.9 mag) and high photospheric velocity relative to other 03fg-like SNe. In the nebular phase, SN 2022pul adds to the increasing diversity of the 03fg-like subclass. From 168 to 336 days after peak B-band brightness, SN 2022pul exhibits asymmetric and narrow emission from [O i] lambda lambda 6300, 6364 (FWHM approximate to 2000 km s-1), strong, broad emission from [Ca ii] lambda lambda 7291, 7323 (FWHM approximate to 7300 km s-1), and a rapid Fe iii to Fe ii ionization change. Finally, we present the first ever optical-to-MIR nebular spectrum of an 03fg-like SN Ia using data from JWST. In the MIR, strong lines of neon and argon, weak emission from stable nickel, and strong thermal dust emission (with T approximate to 500 K), combined with prominent [O i] in the optical, suggest that SN 2022pul was produced by a white dwarf merger within C/O-rich CSM.
dc.description.funderSpace Telescope Science Institute (STScI)https://doi.org/10.13039/100013757
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad0975
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad0975
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91105
dc.identifier.wosidWOS:001133807900001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleGround-based and JWST Observations of SN 2022pul. I. Unusual Signatures of Carbon, Oxygen, and Circumstellar Interaction in a Peculiar Type Ia Supernova
dc.typeartículo
dc.volumen960
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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