TY - JOUR
T1 - LSQ13DDU
T2 - A rapidly evolving stripped-envelope supernova with early circumstellar interaction signatures
AU - Clark, Peter
AU - Maguire, Kate
AU - Inserra, Cosimo
AU - Prentice, Simon
AU - Smartt, Stephen J.
AU - Contreras, Carlos
AU - Hossenizadeh, Griffin
AU - Hsiao, Eric Y.
AU - Kankare, Erkki
AU - Kasliwal, Mansi
AU - Nugent, Peter
AU - Shahbandeh, Melissa
AU - Baltay, Charles
AU - Rabinowitz, David
AU - Arcavi, Iair
AU - Ashall, Chris
AU - Burns, Christopher R.
AU - Callis, Emma
AU - Chen, Ting Wan
AU - Diamond, Tiara
AU - Fraser, Morgan
AU - Andrew Howell, D.
AU - Karamehmetoglu, Emir
AU - Kotak, Rubina
AU - Lyman, Joseph
AU - Morrell, Nidia
AU - Phillips, Mark
AU - Pignata, Giuliano
AU - Pursiainen, Miika
AU - Sollerman, Jesper
AU - Stritzinger, Maximilian
AU - Sullivan, Mark
AU - Young, David
N1 - Publisher Copyright:
© 2019 The Author(s)
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
AB - 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.
KW - Circumstellar matter
KW - Supernovae: general
KW - Supernovae: individual: LSQ13ddu
UR - http://www.scopus.com/inward/record.url?scp=85082653359&partnerID=8YFLogxK
U2 - 10.1093/mnras/stz3598
DO - 10.1093/mnras/stz3598
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85082653359
SN - 0035-8711
VL - 492
SP - 2208
EP - 2228
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -