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Published on: February 12, 2013
マグネタールSGR 1806-20からの巨大なガンマ線フレア
D M Palmer1, S Barthelmy, N Gehrels
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. palmer@lanl.gov
Nature
|April 29, 2005
まとめ
ソフトガンマ線リピーター (SGR) はマグネタールで,強力なX線を放射します. SGR 1806-20からの巨大なフレアは,磁場再構成による可能性が高い2 x 10 ^ 46 ergを放出しました.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天体物理学
- 中性子星物理学 中性子星物理学
背景:
- マグネタは,超強磁場 (約0.3m) を有する中性子星である. 10^15 G) である.
- 柔らかいガンマ線リピーター (SGR) と異常なX線パルサーはマグネタールクラスである.
- SGRは偶発的な爆発と極めて稀な巨大フレアを示します.
研究 の 目的:
- マグネスターSGR 1806-20からの巨大なフレアイベントを報告し,分析するために.
- 観測されたフレアのエネルギー出力と潜在的な原因を特徴付けるために.
主な方法:
- SGR 1806-20からのX線放射データの観測と分析.
- 巨大なフレアイベントのエネルギー計算.
主要な成果:
- 2004年12月27日,SGR 1806-20から巨大なフレアが観測されました.
- このフレアの同型エネルギーは2x1046ergに達し,以前の巨大フレアを大幅に上回った.
- エネルギー放出は,壊滅的な磁場再構成に起因する.
結論:
- 観測された巨大なフレアは,マグネタールエネルギー放出メカニズムについての洞察を提供します.
- このような現象は,銀河外距離から観測された場合,短い,硬いガンマ線爆発として分類することができます.
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