SN 2019tsf: Evidence for Extended Hydrogen-poor CSM in the Three-peaked Light Curve of Stripped Envelope of a Type Ib Supernova

Simple item page
dc.catalogadorgjm
dc.contributor.authorZenati, Yossef
dc.contributor.authorWang, Qinan
dc.contributor.authorBobrick, Alexey
dc.contributor.authorDeMarchi, Lindsay
dc.contributor.authorGlanz, Hila
dc.contributor.authorRozner, Mor
dc.contributor.authorJencson, Jacob E.
dc.contributor.authorRest, Armin
dc.contributor.authorMetzger, Brian D.
dc.contributor.authorMargutti, Raffaella
dc.contributor.authorGómez, Sebastián
dc.contributor.authorSmith, Nathan
dc.contributor.authorToonen, Silvia
dc.contributor.authorBright, Joe S.
dc.contributor.authorNorman, Colin
dc.contributor.authorFoley, Ryan J.
dc.contributor.authorGagliano, Alexander
dc.contributor.authorKrolik, Julian H.
dc.contributor.authorSmartt, Stephen J.
dc.contributor.authorVillar, Ashley V.
dc.contributor.authorNarayan, Gautham
dc.contributor.authorFox, Ori
dc.contributor.authorAuchettl, Katie
dc.contributor.authorBrethauer, Daniel
dc.contributor.authorClocchiatti, Alejandro
dc.contributor.authorCoelln, Sophie V.
dc.contributor.authorCoppejans, Deanne L.
dc.contributor.authorDimitriadis, Georgios
dc.contributor.authorDorozsmai, Andris
dc.contributor.authorDrout, Maria
dc.contributor.authorJacobson-Galan, Wynn
dc.contributor.authorGao, Bore
dc.contributor.authorRidden-Harper, Ryan
dc.contributor.authorKilpatrick, Charles Donald
dc.contributor.authorLaskar, Tanmoy
dc.contributor.authorMatthews, David
dc.contributor.authorSmith, Ken W.
dc.contributor.authorStauffer, Candice McKenzie
dc.contributor.authorRest, Sofia
dc.contributor.authorStroh, Michael C.
dc.contributor.authorStrolger, Louis-Gregory
dc.contributor.authorTerreran, Giacomo
dc.contributor.authorPierel, Justin D. R.
dc.contributor.authorPiro, Anthony L.
dc.date.accessioned2025-11-21T14:50:13Z
dc.date.available2025-11-21T14:50:13Z
dc.date.issued2025
dc.description.abstractWe present multiband ATLAS and ZTF photometry for SN 2019tsf, a Type Ib stripped-envelope supernova (SESN). The slow spectral evolution could be associated with an uncommon explosion mechanism specific to this SN. Possible explanations include fallback accretion onto a compact remnant or a long-lived central engine, both of which could provide extended energy injection responsible for the late-time rebrightening and unusual spectral features. The rebrightening observations represent the latest photometric measurements of a multipeaked Type Ib SN. As late-time photometry and spectroscopy suggest no hydrogen, the potential circumstellar material (CSM) must be H-poor. The absence of a nebular phase and the lack of narrow emission lines in the late-time spectra (>142 days) of the SNe suggest that any CSM interaction is likely asymmetric and enveloped by the SN ejecta. However, an extended CSM structure is evident through a follow-up radio campaign with the Karl G. Jansky Very Large Array (VLA), indicating a source of bright optically thick radio emission at late times, which is highly unusual among H-poor SESNe. We attribute this phenomenology to an interaction of the supernova ejecta with asymmetric CSM, potentially disk-like, and we present several models that may explain the origin of this rare Type Ib supernova. We propose a warped disk model in which a tertiary companion—commonly present around massive stars—perturbs the progenitor's CSM, producing density enhancements that may explain the observed multipeaked SN 2019tsf light curve. This SN 2019tsf is a unique SN Type Ib among the recently discovered class of SNe that undergo mass transfer at the moment of explosion....
dc.fechaingreso.objetodigital2025-11-21
dc.format.extent19 páginas
dc.fuente.origenORCID
dc.identifier.doi10.3847/1538-4357/adf6b1
dc.identifier.urihttps://doi.org/10.3847/1538-4357/adf6b1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/107075
dc.information.autorucInstituto de Astrofísica; Clocchiatti, Alejandro; 0000-0003-3068-4258; 100500
dc.issue.numero1
dc.language.isoen
dc.nota.accesocontenido completo
dc.revistaThe Astrophysical Journal
dc.rightsacceso abierto
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectMagnetars
dc.subjectType Ib supernovae
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleSN 2019tsf: Evidence for Extended Hydrogen-poor CSM in the Three-peaked Light Curve of Stripped Envelope of a Type Ib Supernova
dc.typeartículo
dc.volumen992
sipa.codpersvinculados100500
sipa.trazabilidadORCID;2025-11-17
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Zenati_2025_ApJ_992_9.pdf
Size:
4.74 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas