超新星SN 2008D/XRF 080109の変形:超新星とGRB/超新星との間のリンク
Paolo A Mazzali1, Stefano Valenti, Massimo Della Valle
1Max-Planck Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85748 Garching, Germany. mazzali@mpa-garching.mpg.de
まとめ
特殊な超新星であるSN 2008Dは,ブラックホール形成からの弱い相対論ジェットを示唆する異常な特徴を示した. これは,大質量の恒星崩壊のほとんどで,内部のエンジン活動が起きていることを示しています.
科学分野:
- 天体物理学 天体物理学
- 宇宙の爆発,宇宙の爆発.
- 超新星に関する研究.
背景:
- ガンマ線爆発 (GRB) とX線放射は,エネルギー超新星の一種である超新星 (HNe) と関連しています.
- SN 2008Dは,典型的な広範囲のタイプIc超新星から逸脱する非典型的な特徴を示した.
研究 の 目的:
- SN 2008D.の異常な特徴を分析するために.
- SN 2008Dの爆発の性質とその祖先の星を決定するために.
- 星の崩壊,ブラックホール形成,相対論ジェットとの関連を調査する.
主な方法:
- X線と光学光の曲線を含むSN 2008Dの観測データの詳細な分析.
- SN 2008Dの爆発エネルギーと放出された質量を,通常の超新星と超新星と比較.
- 先祖星の質量と崩壊メカニズムのモデリング.
主要な成果:
- SN 2008Dは弱いX線フラッシュ (XRF),初期の光学ピーク,およびタイプIbとタイプIcの超新星の両方のスペクトル特性を示しました.
- その爆発エネルギーと放出された質量は,通常のSNe IbcとHNe.cの間の中間値でした.
- 分析によると,太陽の質量約30倍の原始恒星が崩壊してブラックホールと弱い相対論ジェットを形成している.
結論:
- SN 2008Dは,観測された中で最も弱いジェット生成爆発の1つを表しています.
- この発見は,ジェット生成につながる内部エンジンの活動が,巨大な星の崩壊によるブラックホールの形成の間に一般的な現象であることを示唆しています.
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