孤立した若い中性子星の周りの破片ディスク
Zhongxiang Wang1, Deepto Chakrabarty, David L Kaplan
1Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Nature
|April 7, 2006
まとめ
天文学者は,若いX線パルサーの周りの冷たい円盤を発見し,超新星フォールバックディスクの証拠を提供しました. この発見は,中性子星の周りの惑星形成の可能性を示唆しています.
科学分野:
- 天文学 (astronomy) 天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは
- 天体物理学 天体物理学
- 恒星の進化について
背景:
- パルサーは,超新星爆発によって形成された旋回中性子星です.
- 超新星モデルはバックバックディスクを予測しますが,観測証拠は稀です.
- フォールバックディスクは,パルサーの進化とブラックホールの形成に影響を与える可能性があります.
研究 の 目的:
- パルサーの周りのバックバックディスクの観測証拠を探すために.
- X線パルサーの周りの新発見の円盤の性質と起源を調査する.
主な方法:
- 孤立した若いX線パルサーから観測された中赤外線放射.
- 質量と寿命を含むディスクの性質を分析した.
- スーパーノヴァのフォールバックの理論的予測とディスクの特徴を比較した.
主要な成果:
- 若いX線パルサーの周りに冷たい中赤外線放射ディスクを発見した.
- 円盤の質量は約10地球の質量であり,寿命は106年を超えています.
- この円盤はパルサーのX線で受動的に照らされ,原惑星円盤に似ています.
結論:
- 観測された円盤は,超新星フォールバックの理論を支持する.
- ディスクの性質は,フォールバックの起源と一致しています.
- この発見は,若い中性子星の周りに惑星が形成される可能性を示唆している.
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