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dc.contributor.authorSahu, D. K-
dc.contributor.authorAnupama, G. C-
dc.contributor.authorChakradhari, N. K-
dc.contributor.authorSrivastav, S-
dc.contributor.authorTanaka, M-
dc.contributor.authorMaeda, K-
dc.contributor.authorNomoto, K-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 475, No. 2, pp. 2591–2604en_US
dc.descriptionRestricted Accessen_US
dc.description.abstractWe present optical and ultraviolet photometry and low-resolution optical spectroscopy of the broad-line Type Ic supernova SN 2014ad in the galaxy PGC 37625 (Mrk 1309), covering the evolution of the supernova during −5 to +87 d with respect to the date of maximum in the B band. A late-phase spectrum obtained at +340 d is also presented. With an absolute V-band magnitude at peak of MV = −18.86 ± 0.23 mag, SN 2014ad is fainter than supernovae associated with gamma ray bursts (GRBs), and brighter than most of the normal and broad-line Type Ic supernovae without an associated GRB. The spectral evolution indicates that the expansion velocity of the ejecta, as measured using the Si II line, is as high as ∼33 500 km s−1 around maximum, while during the post-maximum phase it settles at ∼15 000 km s−1. The expansion velocity of SN 2014ad is higher than that of all other well-observed broad-line Type Ic supernovae except for the GRB-associated SN 2010bh. The explosion parameters, determined by applying Arnett's analytical light-curve model to the observed bolometric light-curve, indicate that it was an energetic explosion with a kinetic energy of ∼(1 ± 0.3) × 1052 erg and a total ejected mass of ∼(3.3 ± 0.8) M⊙, and that ∼0.24 M⊙ of 56Ni was synthesized in the explosion. The metallicity of the host galaxy near the supernova region is estimated to be ∼0.5 Z⊙.en_US
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen_US
dc.rights© Royal Astronomical Society-
dc.subjectTechniques: photometricen_US
dc.subjectTechniques: spectroscopicen_US
dc.subjectSupernovae: generalen_US
dc.subjectSupernovae: individual: SN 2014aden_US
dc.subjectGalaxies: individual: Mrk 1309en_US
dc.titleBroad-line Type Ic supernova SN 2014aden_US
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