Gangopadhyay, A and Misra, K and Sahu, DK and Wang, S-Q and Kumar, B and Li, L and Anupama, GC and Dastidar, R and Elias-Rosa, N and Kumar, B and Singh, M and Pandey, SB and Sanwal, P and Singh, A and Srivastav, S and Tartaglia, L and Tomasella, L (2020) Optical studies of two stripped-envelope supernovae-SN 2015ap (Type Ib) and SN 2016P (Type Ic). In: Monthly Notices of the Royal Astronomical Society, 497 (3). pp. 3770-3789.
|
PDF
mon_not_roy_493-3_3770-3789-2020.pdf - Published Version Download (3MB) | Preview |
Abstract
We present the photometric and spectroscopic studies of a Type Ib SN 2015ap and a Type Ic SN 2016P. SN 2015ap is one of the bright (MV =-18.04 mag) Type Ib while SN 2016P lies at an average value among the Type Ic SNe (MV =-17.53 mag). Bolometric light-curve modelling of SNe 2015ap and 2016P indicates that both the SNe are powered by 56Ni + magnetar model with 56Ni masses of 0.01 and 0.002 M⊙, ejecta masses of 3.75 and 4.66 M⊙, spin period P0 of 25.8 and 36.5 ms, and magnetic field Bp of 28.39 × 1014 and 35.3 × 1014 G, respectively. The early spectra of SN 2015ap show prominent lines of He with a 'W' feature due to Fe complexes while other lines of Mg ii, Na i, and Si ii are present in both SNe 2015ap and 2016P. Nebular phase [O i] profile indicates an asymmetric profile in SN 2015ap. The [O i]/[Ca ii] ratio and nebular spectral modelling of SN 2015ap hint towards a progenitor mass between 12 and 20 M⊙. © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
| Item Type: | Journal Article |
|---|---|
| Publication: | Monthly Notices of the Royal Astronomical Society |
| Publisher: | Oxford University Press |
| Additional Information: | The copyright for this article belongs to the Author(s). |
| Keywords: | galaxies: Individual: IC 1776, NGC 5374; supernovae: General; supernovae: Individual: SNe 2015ap, 2016P; techniques: Photometric; techniques: Spectroscopic; transients: Supernovae |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 13 Jan 2023 04:54 |
| Last Modified: | 13 Jan 2023 04:54 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79081 |
Actions (login required)
 |
View Item |
