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LSQ13ddu: a rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures

LSQ13ddu: a rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures
LSQ13ddu: a rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures
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.
circumstellar matter, supernovae: general, supernovae: individual: LSQ13ddu
0035-8711
2208-2228
Clark, Peter
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Maguire, Kate
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Inserra, Cosimo
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Prentice, Simon
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Smartt, Stephen J.
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Contreras, Carlos
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Hossenizadeh, Griffin
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Hsiao, Eric Y.
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Kankare, Erkki
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Kasliwal, Mansi
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Nugent, Peter
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Shahbandeh, Melissa
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Baltay, Charles
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Rabinowitz, David
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Arcavi, Iair
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Ashall, Chris
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Burns, Christopher R.
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Callis, Emma
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Chen, Ting-Wan
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Diamond, Tiara
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Fraser, Morgan
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Howell, D. Andrew
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Karamehmetoglu, Emir
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Kotak, Rubina
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Lyman, Joseph
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Morrell, Nidia
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Phillips, Mark
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Pignata, Giuliano
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Pursiainen, Miika
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Sollerman, Jesper
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Stritzinger, Maximilian
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Sullivan, Mark
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Young, David
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Clark, Peter
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Maguire, Kate
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Inserra, Cosimo
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Prentice, Simon
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Smartt, Stephen J.
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Contreras, Carlos
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Hossenizadeh, Griffin
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Hsiao, Eric Y.
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Kankare, Erkki
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Kasliwal, Mansi
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Nugent, Peter
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Shahbandeh, Melissa
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Baltay, Charles
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Rabinowitz, David
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Arcavi, Iair
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Ashall, Chris
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Burns, Christopher R.
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Callis, Emma
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Chen, Ting-Wan
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Diamond, Tiara
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Fraser, Morgan
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Howell, D. Andrew
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Karamehmetoglu, Emir
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Kotak, Rubina
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Lyman, Joseph
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Morrell, Nidia
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Phillips, Mark
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Pignata, Giuliano
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Pursiainen, Miika
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Sollerman, Jesper
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Stritzinger, Maximilian
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Sullivan, Mark
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Young, David
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Clark, Peter, Maguire, Kate, Inserra, Cosimo, Prentice, Simon, Smartt, Stephen J., Contreras, Carlos, Hossenizadeh, Griffin, Hsiao, Eric Y., Kankare, Erkki, Kasliwal, Mansi, Nugent, Peter, Shahbandeh, Melissa, Baltay, Charles, Rabinowitz, David, Arcavi, Iair, Ashall, Chris, Burns, Christopher R., Callis, Emma, Chen, Ting-Wan, Diamond, Tiara, Fraser, Morgan, Howell, D. Andrew, Karamehmetoglu, Emir, Kotak, Rubina, Lyman, Joseph, Morrell, Nidia, Phillips, Mark, Pignata, Giuliano, Pursiainen, Miika, Sollerman, Jesper, Stritzinger, Maximilian, Sullivan, Mark and Young, David (2020) LSQ13ddu: a rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures. Monthly Notices of the Royal Astronomical Society, 492 (2), 2208-2228. (doi:10.1093/mnras/stz3598).

Record type: Article

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.

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Accepted/In Press date: 20 December 2019
e-pub ahead of print date: 3 January 2020
Published date: 1 February 2020
Additional Information: c2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society
Keywords: circumstellar matter, supernovae: general, supernovae: individual: LSQ13ddu

Identifiers

Local EPrints ID: 455142
URI: http://eprints.soton.ac.uk/id/eprint/455142
ISSN: 0035-8711
PURE UUID: a24ddc5a-7740-48a6-9974-1485c7de1ccc
ORCID for Cosimo Inserra: ORCID iD orcid.org/0000-0002-3968-4409
ORCID for Mark Sullivan: ORCID iD orcid.org/0000-0001-9053-4820

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Date deposited: 10 Mar 2022 18:30
Last modified: 03 Sep 2022 01:48

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Contributors

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

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