局所的な恒星間磁場の方向です
M Opher1, E C Stone, T I Gombosi
1Department of Physics and Astronomy, George Mason University, 4400 University Drive, Fairfax, VA 22030, USA. mopher@physics.gmu.edu
Science (New York, N.Y.)
|May 15, 2007
まとめ
地元の恒星間磁場である.
科学分野:
- 宇宙物理学 宇宙物理学
- ヘリオフィジックス ヘリオフィジックス
- 天体物理学 天体物理学
背景:
- ヘリオスフィアの形状と行動は,星間磁場の影響を受けています.
- ヘリオスフィアの非対称性は,放射能とイオンストリーミングに影響します.
- 地元の恒星間磁場の方向性を理解することは極めて重要です.
研究 の 目的:
- 局所的な恒星間磁場の方向を決定する.
- ヘリオスフィアの現象に及ぼす影響を調査する.
- 局所的な磁場方向を,大規模な恒星間磁場と比較する.
主な方法:
- ラジオ放射とエネルギー粒子流の観測データを組み合わせた.
- 広範な3次元磁気水力動力学 (MHD) コンピュータシミュレーションを使用しました.
- モデル化された磁場がヘリオパウズを覆っている.
主要な成果:
- 地元の星間磁場平面は,銀河平面から60度から90度まで方向づけられています.
- この向きは,ヘリオスフィアの非対称性を生み出します.
- ラジオ放射の位置とイオン流の方向に観測された影響.
結論:
- 地元の恒星間磁場の方向性は,銀河平面から著しく偏っています.
- 局所恒星間雲の場は,より大規模な恒星間場とは異なる.
- この発見は,ヘリオスフィアと恒星間媒体のモデルに意味を持ちます.
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