Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7471
Title: SN 2016B a.k.a. ASASSN-16ab: a transitional Type II supernova
Authors: Dastidar, R
Misra, K
Singh, M
Sahu, D. K
Pastorello, A
Gangopadhyay, A
Tomasella, L
Benetti, S
Terreran, G
Sanwal, Pankaj
Kumar, B
Singh, A
Brajesh Kumar
Anupama, G. C
Pandey, S. B
Keywords: Techniques: photometric;Techniques: polarimetric;Techniques: spectroscopic;Supernovae: general;Supernovae: individual ASASSN-16ab/SN 2016B;Galaxies: individual: PGC 037392
Issue Date: Jun-2019
Publisher: Oxford University Press on behalf of the Royal Astronomical Society
Citation: Monthly Notices of the Royal Astronomical Society, Vol. 486, No. 2, pp. 2850–2872
Abstract: We present photometry, polarimetry, and spectroscopy of the Type II supernova ASASSN-16ab/SN 2016B in PGC 037392. The photometric and spectroscopic follow-up commenced about 2 weeks after shock breakout and continued until nearly 6 months. The light curve of SN 2016B exhibits intermediate properties between those of Type IIP and IIL. The early decline is steep (1.68 ± 0.10 mag 100 d−1), followed by a shallower plateau phase (0.47 ± 0.24 mag 100 d−1). The optically thick phase lasts for 118 d, similar to Type IIP. The 56Ni mass estimated from the radioactive tail of the bolometric light curve is 0.082 ± 0.019 M⊙. High-velocity component contributing to the absorption trough of H α and H β in the photospheric spectra are identified from the spectral modelling from about 57–97 d after the outburst, suggesting a possible SN ejecta and circumstellar material interaction. Such high-velocity features are common in the spectra of Type IIL supernovae. By modelling the true bolometric light curve of SN 2016B, we estimated a total ejected mass of ∼15 M⊙, kinetic energy of ∼1.4 foe, and an initial radius of ∼400 R⊙.
Description: Restricted Access
URI: http://hdl.handle.net/2248/7471
ISSN: 1365-2966
???metadata.dc.rights???: © Royal Astronomical Society
???metadata.dc.relation.uri???: https://doi.org/10.1093/mnras/stz949
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