フォアショック,ターミネーションショック,ヘリオシースでのボイジャー1
R B Decker1, S M Krimigis, E C Roelof
1Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723, USA. robert.decker@jhuapl.edu
まとめ
ヴォイジャー1号は,エネルギー粒子強度の増加と太陽風の内向きの流れを検出し,2004年にヘリオスフィアの終結ショック (TS) を越えたことを示しました. 宇宙船は,それ以来,ヘリオシートに留まっています.
科学分野:
- 宇宙物理学の宇宙物理学
- ヘリオフィジックス ヘリオフィジックス
- プラズマ物理学のプラズマ物理学
背景:
- ボイジャー1号 (V1) は,2002年にヘリオスフィアの終結ショック (TS) からのエネルギー粒子を測定し始めました.
- V1がTSエネルギー粒子への衝撃の深さに進むにつれて粒子の強度は増加した.
研究 の 目的:
- ボイジャー1号のエネルギー粒子強度と太陽風の流れの観測を分析するために.
- 旅行者1号によるヘリオスフィアの終点衝撃横断のタイミングと位置を決定する.
主な方法:
- ヴォイジャー1号からのエネルギーイオンと電子データの分析.
- 太陽風の放射流速の推定. 太陽風の放射流速の推定. 太陽風の放射流速の推定.
- エネルギーのある陽子のデータのスペクトル分析.
主要な成果:
- V1は2004年を通して,エネルギーイオンと電子の変動し,大きな強度を観測しました.
- 2004年の350日頃には,著しい強度の急上昇と持続的な増加が起こりました.
- 太陽風の流れは,2004年の351日ごろ,外側から内側 (太陽に向かって) にシフトした.
結論:
- ヴォイジャー1号は,2004年5月31日に94.0天文単位でヘリオスフィアの終止ショックを通過した.
- 衝突は,太陽風の圧力が低下したため,衝撃が内側に移動したときに発生した.
- 旅行者1号は,通過以来,ヘリオシートに留まり,観測は熱した星間ピックアップイオンによって支配されています.
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