タイプIax超新星2012Zの輝く青い祖先系である
Curtis McCully1, Saurabh W Jha1, Ryan J Foley2
1Department of Physics and Astronomy, Rutgers, the State University of New Jersey, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA.
Nature
|August 8, 2014
まとめ
Ia型超新星の一種であるIax型超新星は,Ia型超新星の一種で,エネルギーが少ないもので,白矮星が爆発することが多い. SN 2012Zの祖先は,輝く青い星系として特定され,ヘリウム星の伴侶を示唆しています.
科学分野:
- 天体物理学 天体物理学
- 恒星の進化について
- 超新星とは,超新星です.
背景:
- Iax型超新星は,IA型超新星の一種であり,射出速度と輝度が低いことが特徴です.
- 彼らの後期スペクトルはタイプIaとは異なるが,組成は関連性を示唆している.
- 通常のタイプIア超新星発生率の5-30%で発生します.
研究 の 目的:
- Iax型超新星 SN 2012Z.の祖先系を特定する.
- Iax型超新星の性質と,Ia型超新星との関係を調査する.
主な方法:
- 爆発前の深層イメージングは,SN 2012Zの祖先システムを検出するために使用されました.
- プロジェニター・システムのスペクトル検査と光度測定分析.
- ヘリウム新星V445 Puppisを含む既知の恒星系との比較.
主要な成果:
- SN 2012Zの輝く青い祖先系は,爆発前の画像で検出されました.
- 先祖系の特徴 (光度,色,環境) は,ヘリウム新星V445 Puppis.の特徴に似ている.
- この発見は,SN 2012Zは,ヘリウム恒星の伴星から白矮星が形成された結果であることを示唆している.
結論:
- SN 2012Zの祖先系は,白矮星が収縮する型Iax型超新星モデルをサポートしています.
- この発見は,タイプIax超新星の形成と爆発のメカニズムに関する重要な洞察を提供します.
- SN 2012Zが消えた後のさらなる観測は,祖先仮説を確認したり,代替シナリオを探求するために必要です.
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