TY - JOUR
T1 - Broad-line Type Ic supernova SN 2014ad
AU - Sahu, D. K.
AU - Anupama, G. C.
AU - Chakradhari, N. K.
AU - Srivastav, S.
AU - Tanaka, Masaomi
AU - Maeda, Keiichi
AU - Nomoto, Ken'ichi
N1 - Funding Information:
Originally received: April 4, 1994. Revision accepted: October 5, 1994. From the Department ofOphthalmology, Mayo Clinic and Mayo Foundation, Rochester. Supported in part by an unrestricted grant from Research to Prevent Blindness, Inc, New York, New York, National Institutes of Health grant EY08039, Bethesda, Maryland, and by the Mayo Clinic and Mayo Foundation, Rochester, Minnesota. Reprint requests to Dennis M. Robertson, MD, Department of Ophthalmology, Mayo Clinic, 200 First St SW, Rochester, MN 55905.
Publisher Copyright:
© 2017 The Authors.
PY - 2018/4/1
Y1 - 2018/4/1
N2 - We 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 broadline 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 lightcurve, 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⊙.
AB - We 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 broadline 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 lightcurve, 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⊙.
KW - Galaxies: individual: Mrk 1309
KW - Supernovae: general
KW - Supernovae: individual: SN 2014ad
KW - Techniques: photometric
KW - Techniques: spectroscopic
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U2 - 10.1093/mnras/stx3212
DO - 10.1093/mnras/stx3212
M3 - Article
AN - SCOPUS:85045951373
VL - 475
SP - 2591
EP - 2604
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 2
ER -