Ground-based and JWST Observations of SN 2022pul. II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type Ia Supernova

Simple item page
dc.contributor.authorKwok, Lindsey A.
dc.contributor.authorSiebert, Matthew R.
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.authorBarnabas, Barna
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.authorPadilla Gonzalez, Estefania
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.authorSaux, 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.authorde Jaeger, Thomas
dc.contributor.authorLu, Jing
dc.contributor.authorMaund, Justyn
dc.contributor.authorMedler, Kyle
dc.contributor.authorMorell, Nidia
dc.contributor.authorShappee, Benjamin J.
dc.contributor.authorStritzinger, Maximilian
dc.contributor.authorSuntzeff, Nicholas
dc.contributor.authorTucker, Michael
dc.contributor.authorWang, Lifan
dc.date.accessioned2025-01-20T16:19:11Z
dc.date.available2025-01-20T16:19:11Z
dc.date.issued2024
dc.description.abstractWe present an analysis of ground-based and JWST observations of SN 2022pul, a peculiar "03fg-like" (or "super-Chandrasekhar") Type Ia supernova (SN Ia), in the nebular phase at 338 days postexplosion. Our combined spectrum continuously covers 0.4-14 mu m and includes the first mid-infrared spectrum of a 03fg-like SN Ia. Compared to normal SN Ia 2021aefx, SN 2022pul exhibits a lower mean ionization state, asymmetric emission-line profiles, stronger emission from the intermediate-mass elements (IMEs) argon and calcium, weaker emission from iron-group elements (IGEs), and the first unambiguous detection of neon in a SN Ia. A strong, broad, centrally peaked [Ne ii] line at 12.81 mu m was previously predicted as a hallmark of "violent merger" SN Ia models, where dynamical interaction between two sub-M-Ch white dwarfs (WDs) causes disruption of the lower-mass WD and detonation of the other. The violent merger scenario was already a leading hypothesis for 03fg-like SNe Ia; in SN 2022pul it can explain the large-scale ejecta asymmetries seen between the IMEs and IGEs and the central location of narrow oxygen and broad neon. We modify extant models to add clumping of the ejecta to reproduce the optical iron emission better, and add mass in the innermost region (<2000 km s(-1)) to account for the observed narrow [O i] lambda lambda 6300, 6364 emission. A violent WD-WD merger explains many of the observations of SN 2022pul, and our results favor this model interpretation for the subclass of 03fg-like SNe Ia.
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ad2c0d
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ad2c0d
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90679
dc.identifier.wosidWOS:001211490900001
dc.issue.numero1
dc.language.isoen
dc.revistaAstrophysical journal
dc.rightsacceso restringido
dc.titleGround-based and JWST Observations of SN 2022pul. II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type Ia Supernova
dc.typeartículo
dc.volumen966
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Ground-based and JWST Observations of SN 2022pul. II. Evidence from Nebular Spectroscopy for a Violent Merger in a Peculiar Type Ia Supernova.pdf
Size:
2.7 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas