dc.contributor.author |
Dastidar, R |
|
dc.contributor.author |
Misra, K |
|
dc.contributor.author |
Singh, M |
|
dc.contributor.author |
Pastorello, A |
|
dc.contributor.author |
Sahu, D. K |
|
dc.contributor.author |
Wang, X |
|
dc.contributor.author |
Gangopadhyay, A |
|
dc.contributor.author |
Tomasella, L |
|
dc.contributor.author |
Zhang, J |
|
dc.contributor.author |
Bose, S |
|
dc.contributor.author |
Mo, J |
|
dc.contributor.author |
Elias-Rosa, N |
|
dc.contributor.author |
Tartaglia, L |
|
dc.contributor.author |
Yan, S |
|
dc.contributor.author |
Brijesh Kumar |
|
dc.contributor.author |
Anupama, G. C |
|
dc.contributor.author |
Pandey, S. B |
|
dc.contributor.author |
Rui, L |
|
dc.contributor.author |
Zhang, T |
|
dc.contributor.author |
Terreran, G |
|
dc.contributor.author |
Ochner, P |
|
dc.contributor.author |
Huang, F |
|
dc.date.accessioned |
2021-07-16T06:03:51Z |
|
dc.date.available |
2021-07-16T06:03:51Z |
|
dc.date.issued |
2021-06 |
|
dc.identifier.citation |
Monthly Notices of the Royal Astronomical Society, Vol. 504, No. 1, pp. 1009–1028 |
en_US |
dc.identifier.issn |
1365-2966 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/7788 |
|
dc.description |
Restricted Access |
en_US |
dc.description.abstract |
We present the photometric and spectroscopic analysis of three Type II supernovae (SNe): 2014cx, 2014cy, and 2015cz. SN 2014cx is a conventional Type IIP with shallow slope (0.2 mag/50 d) and an atypical short plateau (∼86 d). SNe 2014cy and 2015cz show relatively large decline rates (0.88 and 1.64 mag/50 d, respectively) at early times before settling to the plateau phase, unlike the canonical Type IIP/L SN light curves. All of them are normal luminosity SN II with an absolute magnitude at mid-plateau of M50V,14cx=−16.6±0.4mag, M50V,14cy=−16.5±0.2mag, and M50V,15cz=−17.4±0.3mag. A relatively broad range of 56Ni masses is ejected in these explosions (0.027–0.070 M⊙). The spectra shows the classical evolution of SNe II, dominated by a blue continuum with broad H lines at early phases and narrower metal lines with P Cygni profiles during the plateau. High-velocity H I features are identified in the plateau spectra of SN 2014cx at 11 600 kms −1, possibly a sign of ejecta-circumstellar interaction. The spectra of SN 2014cy exhibit strong absorption profile of H I similar to normal luminosity events whereas strong metal lines akin to sub-luminous SNe. The analytical modelling of the bolometric light curve of the three events yields similar progenitor radii within errors (478, 507, and 660 R ⊙ for SNe 2014cx, 2014cy, and 2015cz, respectively), a range of ejecta masses (15.0, 22.2, and 20.6 M ⊙ for SNe 2014cx, 2014cy, and 2015cz), and a modest range of explosion energies (3.3–7.2 foe where 1 foe=10 51erg). |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Oxford University Press on behalf of the Royal Astronomical Society |
en_US |
dc.relation.uri |
https://doi.org/10.1093/mnras/stab831 |
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dc.rights |
© The Royal Astronomical Society |
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dc.subject |
Techniques: photometric |
en_US |
dc.subject |
Techniques: spectroscopic |
en_US |
dc.subject |
Supernovae: general |
en_US |
dc.subject |
Supernovae: individual: SN 2014cx |
en_US |
dc.subject |
SN 2014cy |
en_US |
dc.subject |
SN 2015cz |
en_US |
dc.subject |
Galaxies: individual: NGC 337 |
en_US |
dc.subject |
NGC 7742 |
en_US |
dc.subject |
NGC 582 |
en_US |
dc.title |
The optical properties of three Type II supernovae: 2014cx, 2014cy, and 2015cz |
en_US |
dc.type |
Article |
en_US |