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Bringing the Visible Universe into Focus with Robo-AO
Published on: February 12, 2013
古代の超新星からの光が,大マゲラン雲の超新星から反響している.
Armin Rest1, Nicholas B Suntzeff, Knut Olsen
1Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, La Serena, Chile.
Nature
|December 24, 2005
まとめ
科学者たちは,ビッグ・マゲラン雲の中で,歴史的な超新星からの光のエコーを検出しました. これらのエコーは,超新星の年齢とタイプを決定し,宇宙爆発に関する新しい洞察を提供するのに役立ちます.
科学分野:
- 天文学と天体物理学について
- コスミック・エクスプロージョン (宇宙の爆発)
- スーパーノヴァの残骸
背景:
- 過去の爆発からの散乱光である超新星光のエコーは,超新星位置,年齢,およびタイプを明らかにすることができます.
- 銀河外エコーは知られていますが,歴史的な銀河超新星については見つかりませんでした.
- 銀河系における超新星光の反響の探求は失敗している.
研究 の 目的:
- 超新星を探し出し,超新星を特定するために,ビッグマゲラン雲内の歴史的な超新星からの光のエコー.
- エコー特性を用いて,これらの歴史的な超新星の年齢とタイプを決定する.
主な方法:
- 大マゲラン雲の薄弱で,表面の輝度が変動する複合体の観測.
- これらの複合体の明らかな自己運動の分析.
- 距離と自己運動データを用いて,エコー年齢を推定する.
主要な成果:
- 小さな,おそらく若い超新星残骸に関連した3つの光エコー候補の発見.
- これらの残骸は,タイプIア超新星であると考えられています.
- 特定された2つのエコーの推定年齢は610年と410年です.
結論:
- これらの光のエコーの検出は,ビッグマゲラン雲の超新星の歴史的証拠を提供します.
- この方法は,最初のイベントの長い後に超新星特性の研究を可能にします.
- これは,私たちの銀河の近隣にある超新星の歴史を調査するための新しい道を開きます.
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