太陽のようなM級X線フレアが,ASCA衛星によって観測されたプロキシマ・センタウリにある

B Haisch, A Antunes, J H Schmitt

Science (New York, N.Y.)

|June 2, 1995

まとめ

天文学者は,太陽のM級イベントに匹敵する,プロキシマ・センタウリの恒星フレアを検出しました. これは,恒星と太陽のフレアにおける物理的なプロセスの連続したシーケンスを示唆しています.

科学分野:

天体物理学天体物理学
星の天文学星の天文学
ソーラー物理学ソーラー物理学

背景:

以前,観測された恒星のX線フレアは,機器の制限と巨大な恒星距離のため,太陽のフレアよりもはるかにエネルギーが豊富でした.
観測されたエネルギー差異にもかかわらず,恒星と太陽のフレアが,類似した物理的なプロセスの連続したシーケンスを表している可能性があると仮定されました.

研究の目的:

恒星と太陽のフレアが基本的な物理的プロセスを共有するという仮説を検証するために.
高エネルギー星のフレアと太陽のフレアを,高度な衛星能力を使って比較する.

主な方法:

感度が向上し,高エネルギーX線反応を図るため,宇宙学と天体物理学のための先進衛星 (ASCA) を利用した.
観測された恒星フレアと,ジオステーション操作環境衛星 (GOES) によって記録された太陽フレアを直接比較した.

主要な成果:

プロキシマ・センタウリでX線フレアが検出されました.
これらの検出されたフレアは,GOESのM級太陽フレアのエネルギークラスと一致することが判明しました.

結論:

この発見は,恒星と太陽のフレア間の物理的なプロセスの連続的なシーケンスの仮説を裏付けている.
この研究は,ASCAのような高度な機器が,太陽と恒星のフレア観測の間のギャップを埋める能力を実証しています.

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