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異常なX線パルサー4U0142+61の光学的な対称である
F Hulleman1, M H van Kerkwijk, S R Kulkarni
1Astronomical Institute, Utrecht University, The Netherlands. f.hulleman@astro.uu.nl
Nature
|December 29, 2000
まとめ
異常なX線パルサー (AXP) のエネルギー源は不明である. 深い光学観測により,4U0142+61の近くの特殊な物体が,磁気磁気圏の放射によって動いている可能性のあるその対称物体であると示唆されています.
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
- 高エネルギー天体物理学
背景:
- 異常なX線パルサー (AXP) は,典型的なパルサーや二重星と異なり,明確なエネルギー源がない.
- 標準的なエネルギー損失メカニズム (回転エネルギー,蓄積) は,AXPに十分な電力を供給しません.
- AXPのエネルギー源に関する2つの主要な仮説は,蓄積円盤またはマグネタール磁場崩壊である.
研究 の 目的:
- 異常なX線パルサー (AXP) のエネルギー源を調査する.
- 最も明るいAXPの光学的な対称を識別するには,4U0142+61.
- AXPエネルギーについて,蓄積円盤とマグネタールモデルを区別する.
主な方法:
- AXP 4U0142+61.1.を囲むフィールドの深い光学観測.
- 光学対照の位置と色を分析する.
- 観測された光学放射を理論モデルと比較.
主要な成果:
- 4U0142+61.1.の正確な位置で,異常な光学色のオブジェクトが検出されました.
- 光学放射は,大きな蓄積円盤モデルをサポートするには弱すぎます.
- 観測された光学放射は,磁気圏からの磁気放射と一致しています.
結論:
- 識別された光学オブジェクトは,AXP 4U0142+61.1.の対称である可能性が高い.
- この発見は磁星モデルに好意的であり,磁場崩壊からエネルギーが生まれることを示唆している.
- AXPの性質を確認するために,さらに複数の波長の観測が必要である.
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