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Scattering And Absorption of Light in Planetary Regoliths
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星の風のスペクトル観測から得られた,SN 2013cuのウルフ・ライエトのような祖先である
Avishay Gal-Yam1, I Arcavi1, E O Ofek1
1Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel.
Nature
|May 23, 2014
まとめ
巨大なウルフ・レイエット星は,超新星として爆発する可能性があります. 我々は,超新星2013cuでウルフ・ライエット風のサインを検出し,WN(h) の祖先と爆発前の質量損失を示唆しました.
科学分野:
- 星の天体物理学 星の天体物理学
- 超新星物理学 超新星物理学
背景:
- 巨大なウルフ・レイエット星 (WRS) は,水素が少ない超新星の潜在的祖先である.
- 以前の祖先の識別は不確定であったか,検出不能であった.
研究 の 目的:
- 超新星2013cu (IIb型超新星) の祖先を特定するために.
- 超新星スペクトルのウルフ・ライエットのような風のサインを調査するために.
主な方法:
- フラッシュスペクトロスコピーは,2013cu.の超新星ショックブレイクアウトスペクトルを捉えるために使用されました.
- 分析は,恒星風を示す放射線を特定することに焦点を当てました.
主要な成果:
- 2013cuスペクトルでは,ウルフ・ライエット風のサインと一致する強力な排出線が検出されました.
- これらのシグネチャは,ウルフ・ライエット星のWN(h) サブクラスからの祖先を示唆しています.
- 密度の高い風は,爆発前の質量損失の増加を示唆する可能性があります.
結論:
- 超新星2013cuの祖先は,WN(h) サブクラスの水素不足のウルフ・ライエット星だった可能性が高い.
- この発見は,ウォルフ・レイエ星と水素が少ない超新星を結びつける理論を支持する.
- この結果は,恒星爆発前の質量損失の増加に関する理論的予測と一致しています.
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