RT journal article
T1 SN 2015ba: A Type IIP supernova with a long plateau
A1 Dastidar, Raya
A1 Misra, Kuntal
A1 Hosseinzadeh, G.
A1 Pastorello, A.
A1 Pumo, M. L.
A1 Valenti, S.
A1 McCully, C.
A1 Tomasella, L.
A1 Arcavi, I.
A1 Elias-Rosa, N.
A1 Singh, Mridweeka
A1 Gangopadhyay, Anjasha
A1 Howell, D. A.
A1 Morales Garoffolo, Antonia Isabel
A1 Zampieri, L.
A1 Kumar, Brijesh
A1 Turatto, M.
A1 Benetti, S.
A1 Tartaglia, L.
A1 Ochner, P.
A1 Sahu, D. K.
A1 Anupama, G. C.
A1 Pandey, S. B.
A2 Física Aplicada
K1 techniques: photometric
K1 techniques: spectroscopic
K1 supernovae: general
K1 supernovae: individual: SN 2015ba
K1 galaxies: individual: IC 1029
AB We present optical photometry and spectroscopy from about a week after explosion to ∼272 dof 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 at50 d since explosion and has a long plateau lasting for ∼123 d. The distance to the SN isestimated 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 phasespectra of SN 2015ba, which suggests a possible role of circumstellar interaction at thesephases. Both hydrodynamical and analytical modelling suggest a massive progenitor of SN2015ba with a pre-explosion mass of 24–26 M . However, the nebular spectra of SN 2015baexhibit 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-agemain sequence mass of pre-supernova stars and/or uncertainties in the mixing scenario in theejecta of supernovae.
PB Oxford University Press
SN 1365-2966
YR 2018
FD 2018
LK http://hdl.handle.net/10498/33081
UL http://hdl.handle.net/10498/33081
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026