繰り返し発生する新星RS Ophiuchiにおける時間分解のハドロン粒子加速
, F Aharonian1,2,3, F Ait Benkhali4
1Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.
まとめ
恒星爆発の粒子加速を 確認しました 恒星爆発の粒子加速を 確認しました 恒星爆発の粒子加速を 確認しました この発見は 宇宙線起源のハドロン放射モデルを 支持しています
科学分野:
- 天体物理学
- 高エネルギー天体物理学
- 宇宙線物理学
背景:
- 繰り返し発生する新星は 双星系にある白矮星で 熱核爆発を起こします
- 伴星からの膨張が これらの爆発に燃料を供給します
- 粒子加速は,放出された物質と恒星風の間の衝撃によって発生すると理論化されています.
研究 の 目的:
- 繰り返し発生する新星RS Ophiuchiからの非常に高エネルギー (VHE) ガンマ線の検出を報告する.
- 新星爆発における粒子エネルギー化の起源とメカニズムを調査する.
- 粒子加速と放出過程の理論モデルを制限する.
主な方法:
- 高エネルギーステレオシステム (H.E.S.S.) を用いたRSオフィウチの観測 ) でした.
- VHEガンマ線放射の分析 噴出後1ヶ月まで (2021年)
- 時間のプロフィールと低エネルギーガンマ線放射の比較
主要な成果:
- 2021年の爆発後にRS OphiuchiからVHEガンマ線信号が検出されました.
- VHE放射プロファイルは2日間のピークフクス遅延で低エネルギーガンマ線放射を反映しています.
- 観測により,粒子のエネルギー化のレプトン型よりハドロン型が好ましい.
結論:
- 密度の高い恒星風の中の衝撃は 宇宙線が非常に高いエネルギーに加速する 効率的な場所です
- この研究は,時間依存の粒子エネルギー化モデルに対する重要な観察的制約を提供します.
- RS Ophiuchiは,極端な天体物理粒子加速を研究する重要な研究室として機能しています.
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