近隣の潮破壊事件から数年後,ほぼ周期的なX線噴出
M Nicholl1, D R Pasham2, A Mummery3
1Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast, UK. matt.nicholl@qub.ac.uk.
Nature
|October 9, 2024
まとめ
準周期的な噴火 (QPE) は銀河の核からのX線爆発です. TDE (潮破壊) による9つのQPEを発見し 軌道上の天体が 集積円盤と衝突したことが これらの稀な宇宙現象を説明します
科学分野:
- 天文学と天体物理学
- 高エネルギー天体物理学
- 銀河核現象
背景:
- 準周期的な噴火 (QPEs) は,活動的な銀河核から発生する X線爆発であり,その起源は不明である.
- 現在の理論は,蓄積円盤の不安定性や 周回する恒星物体との相互作用を含んでいる.
- 潮破壊事件 (TDE) は,いくつかのQPEに先行すると仮定されていますが,直接的な関連は確認されていません.
研究 の 目的:
- TDE と QPE の関係を調査する.
- 確認されたTDEに関連したQPEsを識別する.
- 円盤の相互作用によって QPE を引き起こした軌道上の天体の仮説を検証する.
主な方法:
- TDE AT2019qizからのX線,UV線,光学放射の検出と分析
- 蓄積円盤の性質と軌道動態のモデリング.
- 繰り返し発生するX線爆発 (QPE) の識別と特徴付け
主要な成果:
- AT2019qizから9つのX線QPEが検出され,再発時間は ~48時間です.
- 観測されたQPEは,蓄積円盤に衝突する軌道上の天体と一致しています.
- 蓄積円盤の放出は成功しました
結論:
- QPEの繰り返しとTDEとの間の関連が初めて確認されました.
- QPEを生成する可能性が高いのは, 積層円盤と衝突する軌道上の物体です.
- この研究は,銀河核の蓄積円盤動力学とエネルギー現象の理解を進める.
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