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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29324
Title: SN 2016B a.k.a. ASASSN-16ab: a transitional Type II supernova
Authors: Dastidar, Raya
Misra, Kuntal
Singh, Mridweeka
Sahu, D. K.
Pastorello, A.
Gangopadhyay, Anjasha
TOMASELLA, Lina 
BENETTI, Stefano 
Terreran, G.
Sanwal, Pankaj
Kumar, Brijesh
Singh, Avinash
Kumar, Brajesh
Anupama, G. C.
Pandey, S. B.
Issue Date: 2019
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 486
Issue: 2
First Page: 2850
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<SUP>-1</SUP>), followed by a shallower plateau phase (0.47 ± 0.24 mag 100 d<SUP>-1</SUP>). The optically thick phase lasts for 118 d, similar to Type IIP. The <SUP>56</SUP>Ni mass estimated from the radioactive tail of the bolometric light curve is 0.082 ± 0.019 M<SUB>☉</SUB>. 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<SUB>☉</SUB>, kinetic energy of ∼1.4 foe, and an initial radius of ∼400 R<SUB>☉</SUB>.
URI: http://hdl.handle.net/20.500.12386/29324
URL: https://academic.oup.com/mnras/article/486/2/2850/5476505
ISSN: 0035-8711
DOI: 10.1093/mnras/stz949
Bibcode ADS: 2019MNRAS.486.2850D
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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