LSQ13DDU: A rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures

Peter Clark*, Kate Maguire, Cosimo Inserra, Simon Prentice, Stephen J. Smartt, Carlos Contreras, Griffin Hossenizadeh, Eric Y. Hsiao, Erkki Kankare, Mansi Kasliwal, Peter Nugent, Melissa Shahbandeh, Charles Baltay, David Rabinowitz, Iair Arcavi, Chris Ashall, Christopher R. Burns, Emma Callis, Ting Wan Chen, Tiara DiamondMorgan Fraser, D. Andrew Howell, Emir Karamehmetoglu, Rubina Kotak, Joseph Lyman, Nidia Morrell, Mark Phillips, Giuliano Pignata, Miika Pursiainen, Jesper Sollerman, Maximilian Stritzinger, Mark Sullivan, David Young

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

This paper describes the rapidly evolving and unusual supernova LSQ13ddu, discovered by the La Silla-QUEST survey. LSQ13ddu displayed a rapid rise of just 4.8 ± 0.9 d to reach a peak brightness of −19.70 ± 0.02 mag in the LSQgr band. Early spectra of LSQ13ddu showed the presence of weak and narrow He I features arising from interaction with circumstellar material (CSM). These interaction signatures weakened quickly, with broad features consistent with those seen in stripped-envelope SNe becoming dominant around two weeks after maximum. The narrow He I velocities are consistent with the wind velocities of luminous blue variables but its spectra lack the typically seen hydrogen features. The fast and bright early light curve is inconsistent with radioactive 56Ni powering but can be explained through a combination of CSM interaction and an underlying 56Ni decay component that dominates the later time behaviour of LSQ13ddu. Based on the strength of the underlying broad features, LSQ13ddu appears deficient in He compared to standard SNe Ib.

Original languageEnglish
Pages (from-to)2208-2228
Number of pages21
JournalMonthly Notices of the Royal Astronomical Society
Volume492
Issue number2
DOIs
StatePublished - 1 Feb 2020

Funding

FundersFunder number
Science Foundation Ireland University
Villum Fonden
EU/H2020/ERC
Department for Education
Danish Agency for Science and Higher Education
European Commission
Instituto de Astrofisica de Canarias
IPAC
Liverpool John Moores University
Royal Society
Alexander von Humboldt-Stiftung
UK Research and Innovation
Not addedST/P000495/1, PL13B16, ST/P006892/1, ST/M005348/1, PL13B10
Horizon 2020 Framework Programme758638
Ministerio de Economía, Fomento y Turismo13261, IC120009
National Science Foundation1008343, AST-1613472, 615929, AST-1313484, 1313484
Southern Hemisphere188.D-3003
National Aeronautics and Space AdministrationNNX13AF35G
Danmarks Frie ForskningsfondAST-1008343, AST-0306969, AST-0607438, AST-1613455, AST-1613426

    Keywords

    • Circumstellar matter
    • Supernovae: general
    • Supernovae: individual: LSQ13ddu

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