IBEXから太陽の局所銀河環境に関連するTeV宇宙線における地球アニゾトロピー
N A Schwadron1, F C Adams, E R Christian
1University of New Hampshire, Space Science Center, Durham, NH 03824, USA.
まとめ
星間境界探査機 (IBEX) は,恒星間磁場方向が一貫していることを明らかにしています. この発見は,エネルギー中性原子と宇宙線を用いて,私たちの太陽圏に影響を及ぼしています.
科学分野:
- 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
- 宇宙線物理学 宇宙線物理学
背景:
- 星間境界探査機 (IBEX) の観測は,狭いリボンで強化されたエネルギー中性原子 (ENA) 放射を示しています.
- このリボンは,ローカル・インターステラー・メディア (LISM) の磁場方向を中心に位置している可能性が高い.
研究 の 目的:
- 一貫した局所的な恒星間磁場方向を確立するために.
- IBEX ENA観測と高エネルギー宇宙線データとの関連を調査する.
主な方法:
- IBEXからの星間原子測定を分析する.
- IBEX ENAのデータ (数百から数千 eV) と銀河の宇宙線データ (TeVの数十) を比較する.
- 宇宙線観測所 (Milagro, Asγ, IceCube) のグローバルアニソトロピーマップを使用しています.
主要な成果:
- IBEXの最近の局所的な恒星間速度の決定は,テラ電子ボルト (TeV) の宇宙線の恒星間調節と一致しています.
- 超新星源からの拡散拡散は,世界のアニソトロピーマップと一致しています.
結論:
- IBEX ENAと銀河宇宙線の両方を用いて,一貫した局所的な恒星間磁場方向を確立します.
- この発見は,日球の構造とそのLISMとの相互作用を理解するための重要な意味を持つ.
- "ボイジャー"宇宙船がヘリオスフィアから離れる際のデータを解釈するのに不可欠です.
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