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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Broad-lined Supernova 2016coi with a Helium Envelope
Astrophysical Journal, Volume 837, No. 1, Article 1, Year 2017
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Description
We present the early-phase spectra and the light curves of the broad-lined (BL) supernova (SN) 2016coi from t = 7 to 67 days after the estimated explosion date. This SN was initially reported as a BL Type SN Ic (SN Ic-BL). However, we found that spectra up to t = 12 days exhibited the He i λ5876, λ6678, and λ7065 absorption lines. We show that the smoothed and blueshifted spectra of normal SNe Ib are remarkably similar to the observed spectrum of SN 2016coi. The line velocities of SN 2016coi were similar to those of SNe Ic-BL and significantly faster than those of SNe Ib. Analyses of the line velocity and light curve suggest that the kinetic energy and the total ejecta mass of SN 2016coi are similar to those of SNe Ic-BL. Together with BL SNe 2009bb and 2012ap, for which the detection of He i was also reported, these SNe could be transitional objects between SNe Ic-BL and SNe Ib, and be classified as BL Type "Ib" SNe (SNe "Ib"-BL). Our work demonstrates the diversity of the outermost layer in BL SNe, which should be related to the variety of the evolutionary paths. © 2017. The American Astronomical Society. All rights reserved..
Authors & Co-Authors
Yamanaka, Masayuki
Japan, Kobe
Konan University
Nakaoka, Tatsuya
Japan, Higashihiroshima
Hiroshima University
Tanaka, Masaomi
Japan, Minato
National Institutes of Natural Sciences
Maeda, Kei'ichi
Japan, Kyoto
Kyoto University
Japan, Tokyo
The University of Tokyo
Honda, Satoshi
Japan, Kobe
University of Hyogo
Hanayama, Hidekazu
Japan, Minato
National Institutes of Natural Sciences
Morokuma, Tomoki
Japan, Tokyo
The University of Tokyo
Imai, Masataka
Japan, Sapporo
Hokkaido University
Kinugasa, Kenzo
Japan, Minato
National Institutes of Natural Sciences
Murata, Katsuhiro L.
Japan, Nagoya
Nagoya University
Nishimori, Takefumi
Japan, Kagoshima
Kagoshima University
Hashimoto, Osamu
Japan, Takayama, Gunma
Gunma Astronomical Observatory
Kawabata, Miho
Japan, Higashihiroshima
Hiroshima University
Morihana, Kumiko
Japan, Kobe
University of Hyogo
Morikawa, Yuto
Japan, Kagoshima
Kagoshima University
Murakami, Kotone
Japan, Kagoshima
Kagoshima University
Nagayama, Takahiro
Japan, Kagoshima
Kagoshima University
Onozato, Hiroki
Japan, Sendai
Tohoku University
Sarugaku, Yuki
Japan, Tokyo
The University of Tokyo
Suzuki, Daisuke
United States, Greenbelt
Nasa Goddard Space Flight Center
Takahashi, Jun
Japan, Kobe
University of Hyogo
Takayama, Masaki
Japan, Kobe
University of Hyogo
Akitaya, Hiroshi
Japan, Higashihiroshima
Hiroshima University
Asakura, Yuichiro
Japan, Nagoya
Nagoya University
Kawabata, Koji S.
Japan, Higashihiroshima
Hiroshima University
Kuroda, Daisuke
Japan, Minato
National Institutes of Natural Sciences
Nogami, Daisaku
Japan, Kyoto
Kyoto University
Oasa, Yumiko
Japan, Saitama
Saitama University
Omodaká, Toshihiro
Japan, Kagoshima
Kagoshima University
Saito, Yoshihiko
Japan, Tokyo
Tokyo Institute of Technology
Sekiguchi, Kazuhiro
Japan, Minato
National Institutes of Natural Sciences
Tominaga, Nozorau
Japan, Kobe
Konan University
Japan, Tokyo
The University of Tokyo
Uemura, Makoto
Japan, Higashihiroshima
Hiroshima University
Watanabe, Makoto
Japan, Okayama
Okayama University of Science
Statistics
Citations: 12
Authors: 34
Affiliations: 15
Identifiers
Doi:
10.3847/1538-4357/aa5f57
ISSN:
0004637X