Spectropolarimetry of type Ibc supernovae

Masaomi Tanaka, Koji S. Kawabata, Takashi Hattori, Paolo A. Mazzali, Kentaro Aoki, Masanori Iye, Keiichi Maeda, Ken'Ichi Nomoto, Elena Pian, Toshiyuki Sasaki, Masayuki Yamanaka

研究成果: Conference contribution

抄録

Studying a multi-dimensional structure of supernovae (SNe) gives important constraints on the mechanism of the SN explosion. Polarization measurement is one of the most powerful methods to study the explosion geometry of extragalactic SNe. Especially, Type Ib/c SNe are the ideal targets because the core of the explosion is bare. We have performed spectropolarimetric observations of Type Ib/c SNe with the Subaru telescope. We detect a rotation of the polarization angle across the line, which is seen as a loop in the Q-U plane. This indicates that axisymmetry is broken in the SN ejecta. Adding our new data to the sample of stripped-envelope SNe with high-quality spectropolarimetric data, five SNe out of six show a loop in the Q-U plane. This implies that the SN explosion commonly has a non-axisymmetric, three-dimensional geometry.

本文言語English
ホスト出版物のタイトルDeath of Massive Stars
ホスト出版物のサブタイトルSupernovae and Gamma-Ray Bursts
編集者Peter W. A. San Antonio, Nobuyuki Kawai, Elena Pian
ページ138-141
ページ数4
S279
DOI
出版ステータスPublished - 2011 4月
外部発表はい

出版物シリーズ

名前Proceedings of the International Astronomical Union
番号S279
7
ISSN(印刷版)1743-9213
ISSN(電子版)1743-9221

ASJC Scopus subject areas

  • 医学(その他)
  • 天文学と天体物理学
  • 栄養および糖尿病
  • 公衆衛生学、環境および労働衛生
  • 宇宙惑星科学

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