Similarity and difference in GRB-associated SN Ic 1998bw and other type Ib/c supernovae

Keiichi Maeda, Koji Kawabata, Masaomi Tanaka, Paolo A. Mazzali, Ken'ichi Nomoto

研究成果: Conference contribution

抄録

Type Ic supernova SN 1998bw is a prototype of a supernova (SN) associated with a Gamma-Ray Burst (GRB). In this paper, we present similarities and differences in SN 1998bw and other SNe Ib/c. SN 1998bw is shown to be a highly bipolar explosion viewed from the polar direction, based on comparisons between multi-dimensional radiation transfer calculations and various optical observations. The explosion energy is estimated to be ∼ 10 times that of normal SNe Ib/c, even if the viewing angle effect on the estimate of the energy is taken into account. The typical explosion geometry of other SNe Ib/c are derived based on late-time spectra taken by the SUBARU and VLT telescopes. They are shown to be in general asymmetric as well, likely sharing the similar bipolar geometry. The degree of the asymmetry is shown to be on average smaller in normal SNe Ib/c than in SN 1998bw, indicating the intrinsically different explosion mechanisms.

本文言語English
ホスト出版物のタイトルDeciphering the Ancient Universe with Gamma-Ray Bursts
ページ366-368
ページ数3
DOI
出版ステータスPublished - 2010 12 13
外部発表はい
イベントInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts" - Kyoto, Japan
継続期間: 2010 4 192010 4 23

出版物シリーズ

名前AIP Conference Proceedings
1279
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

OtherInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts"
国/地域Japan
CityKyoto
Period10/4/1910/4/23

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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