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可能性のある新しい銀河磁星からの非常に速い光学フレアリング
A Stefanescu1, G Kanbach, A Słowikowska
1Max-Planck-Institute for Extraterrestrial Physics, PO Box 1312, 85741 Garching, Germany. astefan@mpe.mpg.de
Nature
|September 27, 2008
まとめ
天文学者たちは,銀河間トランジントのSWIFT J195509.6+261406.06から,非常に速く明るい光学フレアを観測しました. この発見は,マグネタールのようなプロセスが強力な光学放射を生じさせ,以前の観測に異議を唱える可能性があることを示唆しています.
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
- 観測天文学は,観測による天文学である.
背景:
- 急速で明るいフレアは,コンパクトな物体 (白矮星,中性子星,ブラックホール) の典型です.
- 急速な変動 (数秒未満) は,ガンマ線爆発のような現象によるX線およびガンマ線爆発において一般的です.
- このような急速な光学フレアリングは,光学フォローアップ観測時間スケールの制限のため,ほとんど観察されていません.
研究 の 目的:
- 極めて明るく急速な光学フレアリングの前例のない観測を報告する.
- 銀河間の一時的なSWIFT J195509.6+261406.06の性質を調査するために
- 観測された光学フレアリングと高エネルギー現象を比較する.
主な方法:
- 銀河間トランジントSWIFTの高カデンスの光学モニタリング J195509.6+261406.
- 光学光の曲線を分析して,発火の特徴を特定する.
- 類似した天体物理学的源からの既知の高エネルギー光曲線との現象学的比較.
主要な成果:
- SWIFT J195509.6+261406.06からの非常に明るく速い光学フレアリングの観測
- 光学的な光線曲線は,柔らかいガンマ線リピーターや異常なX線パルサーの高エネルギー光線曲線に類似している.
- 観測された現象は,通常マグネタールと関連付けられているプロセスからの強い光学放射を示唆しています.
結論:
- 発見は,磁器のようなプロセスは,有意な光学放射を生成することを示しています.
- これは,このような現象は主に高エネルギー体制で観察されるという従来の理解に挑戦しています.
- この研究は,磁星物理と一時的な天文現象を理解するための新しい道を開きます.
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