@misc{10498/33081,
year = {2018},
url = {http://hdl.handle.net/10498/33081},
abstract = {We present optical photometry and spectroscopy from about a week after explosion to ∼272 d
of an atypical Type IIP supernova, SN 2015ba, which exploded in the edge-on galaxy IC 1029.
SN 2015ba is a luminous event with an absolute V-band magnitude of −17.1 ± 0.2 mag at
50 d since explosion and has a long plateau lasting for ∼123 d. The distance to the SN is
estimated to be 34.8±0.7Mpc using the expanding photosphere and standard candlemethods.
High-velocity H Balmer components constant with time are observed in the late-plateau phase
spectra of SN 2015ba, which suggests a possible role of circumstellar interaction at these
phases. Both hydrodynamical and analytical modelling suggest a massive progenitor of SN
2015ba with a pre-explosion mass of 24–26 M . However, the nebular spectra of SN 2015ba
exhibit insignificant levels of oxygen, which is otherwise expected from a massive progenitor.
This might be suggestive of the non-monotonical link between O-coremasses and the zero-age
main sequence mass of pre-supernova stars and/or uncertainties in the mixing scenario in the
ejecta of supernovae.},
publisher = {Oxford University Press},
keywords = {techniques: photometric},
keywords = {techniques: spectroscopic},
keywords = {supernovae: general},
keywords = {supernovae: individual: SN 2015ba},
keywords = {galaxies: individual: IC 1029},
title = {SN 2015ba: A Type IIP supernova with a long plateau},
doi = {10.1093/mnras/sty1634},
author = {Dastidar, Raya and Misra, Kuntal and Hosseinzadeh, G. and Pastorello, A. and Pumo, M. L. and Valenti, S. and McCully, C. and Tomasella, L. and Arcavi, I. and Elias-Rosa, N. and Singh, Mridweeka and Gangopadhyay, Anjasha and Howell, D. A. and Morales Garoffolo, Antonia Isabel and Zampieri, L. and Kumar, Brijesh and Turatto, M. and Benetti, S. and Tartaglia, L. and Ochner, P. and Sahu, D. K. and Anupama, G. C. and Pandey, S. B.},
}