太陽と近くの星:高解像度のマイクロ波観測

M R Kundu, K R Lang

Science (New York, N.Y.)

|April 5, 1985

まとめ

高解像度のマイクロ波観測により,太陽噴火の引き金が明らかになりました. 新興ループや再接続などの冠状ループの磁気変化は,噴火に先行し,電子を加速し,恒星爆発に似たマイクロ波エネルギーを放出します.

科学分野:

* 太陽物理学と天体物理学.
* 恒星のマイクロ波放射分析.

背景:

* 活発な地域と太陽/恒星の噴火は,高解像度のマイクロ波観測を用いて研究されています.
* 冠状回路における磁場は,これらの現象を理解するために極めて重要です.

研究の目的:

* 太陽の噴火に先立つ磁場動態を調査する.
* 太陽のマイクロ波放射を,近くの恒星からの放射と比較するために.

主な方法:

* Very Large Array (VLA) から高解像度のマイクロ波観測を用いた.
* 分析されたVLAのスナップショットマップは,アーチ秒未満の角度解像度と10秒間の時間解像度.
* コロナループの磁場強度,進化,構造を調べた.

主要な成果:

* 微小な時間スケールで太陽の噴火に先立つ新興の冠状回路と相互作用を特定しました.
*ループのインターフェイスでの磁気再接続は,電子を加速させ,マイクロ波エネルギー放出を誘発する可能性があります.
* 観測された太陽マイクロ波の爆発と,後期型のメインシーケンス星からの放射の間の驚くべき類似点.

結論:

*高解像度のマイクロ波観測により,太陽と恒星の活動に関する重要な洞察が得られる.
*磁場ダイナミクス,特に再接続は,噴火とマイクロ波の爆発を誘発する上で重要な役割を果たします.
* 太陽と恒星のマイクロ波放射は,共通の物理的メカニズムを共有しています.

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