The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr

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dc.contributor.authorPing Chen
dc.contributor.authorSubo Dong
dc.contributor.authorM. D. Stritzinger
dc.contributor.authorSimon Holmbo
dc.contributor.authorJay Strader
dc.contributor.authorC. S. Kochanek
dc.contributor.authorEric W. Peng
dc.contributor.authorS. Benetti
dc.contributor.authorD. Bersier
dc.contributor.authorSasha Brownsberger
dc.contributor.authorDavid A. H. Buckley
dc.contributor.authorMariusz Gromadzki
dc.contributor.authorShane Moran
dc.contributor.authorA. Pastorello
dc.contributor.authorElias Aydi
dc.contributor.authorSubhash Bose
dc.contributor.authorThomas Connor
dc.contributor.authorK. Boutsia
dc.contributor.authorF. Di Mille
dc.contributor.authorN. Elias-Rosa
dc.contributor.authorK. Decker French
dc.contributor.authorThomas W.-S. Holoien
dc.contributor.authorSeppo Mattila
dc.contributor.authorB. J. Shappee
dc.contributor.authorAntony A. Stark
dc.contributor.authorSamuel J. Swihart
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code1.2.246.10.2458963.20.90670098848
dc.converis.publication-id46861022
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/46861022
dc.date.accessioned2025-08-27T20:48:36Z
dc.date.available2025-08-27T20:48:36Z
dc.description.abstractWe report observations of the hydrogen-deficient supernova (SN) 2019bkc/ATLAS19dqr. With B- and r-band decline between peak and 10 days post peak of Dm10 (B) = 5.24. 0.07 mag and Dm10 (r) = 3.85. 0.10 mag, respectively, SN.2019bkc is the most rapidly declining SN I discovered so far. While its closest matches are the rapidly declining SN.2005ek and SN. 2010X, the light curves and spectra of SN.2019bkc show some unprecedented characteristics. SN.2019bkc appears "hostless," with no identifiable host galaxy near its location, although it may be associated with the galaxy cluster MKW1 at z.=.0.02. We evaluate a number of existing models of fast-evolving SNe, and we find that none of them can satisfactorily explain all aspects of SN.2019bkc observations.
dc.identifier.jour-issn2041-8205
dc.identifier.olddbid200274
dc.identifier.oldhandle10024/183301
dc.identifier.urihttps://www.utupub.fi/handle/11111/45954
dc.identifier.urnURN:NBN:fi-fe2021042821998
dc.language.isoen
dc.okm.affiliatedauthorMoran-Kelly, Shane
dc.okm.affiliatedauthorMattila, Seppo
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherIOP PUBLISHING LTD
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.articlenumberARTN L6
dc.relation.doi10.3847/2041-8213/ab62a4
dc.relation.ispartofjournalAstrophysical Journal Letters
dc.relation.issue1
dc.relation.volume889
dc.source.identifierhttps://www.utupub.fi/handle/10024/183301
dc.titleThe Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
dc.year.issued2020

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