ジェミンガの尾:パルサーの弓の衝撃が,星間媒体を探査している
P A Caraveo1, G F Bignami, A DeLuca
1Istituto di Astrofisica Spaziale e Fisica Cosmica-Consiglio Nazionale della Richerche, Via Bassini, 15-20133 Milano, Italy. pat@mi.iasf.cnr.it
Science (New York, N.Y.)
|July 26, 2003
まとめ
X線観測により,パルサーの超音速運動によって引き起こされた,パルサージェミンガを尾行する2つの並列の尾が明らかになった. このパルサーの弓の衝撃検出は,電子のエネルギーと磁場についての洞察を提供します.
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
- プラズマ物理学のプラズマ物理学
背景:
- パルサーは,急速に回転する中性子星で,放射線束を放射します.
- パルサー風雲は,パルサー風が恒星間介質との相互作用によって形成されます.
- ジェミンガは,近くの孤立した中性子星です.
研究 の 目的:
- パルサージェミンガと関連しているX線尾の性質を調査する.
- 放射機構とX線尾の物理的性質を分析する.
- パルサーの弓の衝撃のX線検出を使用して,天体物理学的パラメータを制限します.
主な方法:
- X線マルチミラーミッション-ニュートン欧州フォトン画像カメラ (EPIC) のデータを活用した.
- 長方形のX線尾の形状とスペクトル特性を分析した.
- 弓の衝撃構造内の電子シンクロトロン放出をモデル化した.
主要な成果:
- 2つの並列のX線尾がゲミンガの後ろに並んで,その超音速運動に並んでいるのが観察されました.
- 尾は,電子-シンクロトロン放出を示す非熱スペクトルを示しています.
- 電子の冷却時間は,観測されたX線特征の通過時間と一致します.
結論:
- X線尾は,ジェミンガの風が恒星間介質と相互作用することによって形成されたパルサーの弓ショックを表しています.
- この検出により,パルサーの電子注入エネルギーと衝撃の磁場を推定することができます.
- 制限されたゲミンガの運動角度と周囲の局所物質の密度.
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