SIMBAD references

2018MNRAS.479.2421D - Mon. Not. R. Astron. Soc., 479, 2421-2442 (2018/September-2)

SN 2015ba: a Type IIP supernova with a long plateau.

DASTIDAR R., MISRA K., HOSSEINZADEH G., PASTORELLO A., PUMO M.L., VALENTI S., McCULLY C., TOMASELLA L., ARCAVI I., ELIAS-ROSA N., SINGH M., GANGOPADHYAY A., HOWELL D.A., MORALES-GAROFFOLO A., ZAMPIERI L., KUMAR B., TURATTO M., BENETTI S., TARTAGLIA L., OCHNER P., SAHU D.K., ANUPAMA G.C. and PANDEY S.B.

Abstract (from CDS):

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 ± 0.7 Mpc using the expanding photosphere and standard candle methods. 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-core masses and the zero-age main sequence mass of pre-supernova stars and/or uncertainties in the mixing scenario in the ejecta of supernovae.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: spectroscopic - supernovae: general - supernovae: individual: SN 2015ba - galaxies: individual: IC 1029

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 48

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2021.01.18-15:39:47

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