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光学とX線で明るく輝く恒星の潮破壊フレアASASSN-14liからのラジオジェット
S van Velzen1, G E Anderson2, N C Stone3
1Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA. sjoert@jhu.edu.
まとめ
天文学者は,新発射ジェットを示唆する,恒星の潮破壊イベント (TDE) からのラジオ放射を検出しました. この発見は,ジェットがTDEで一般的であることを示唆し,それ以前に検出されなかった理由を説明します.
科学分野:
- 天文学と天体物理学
- ブラックホール物理学
- 高エネルギー天体物理学
背景:
- 超大質量ブラックホール (SMBH) は 恒星を潮的に破壊し 光る熱フレアを生み出します
- 以前から観測された恒星の熱波の観測は 決定的な検出結果が得られませんでした
- TDFの無線対照の探求は,蓄積プロセスとジェット打ち上げを理解するために不可欠です.
研究 の 目的:
- 熱性TDFからの最初の無線放射の決定的な検出を報告する.
- この無線放射の起源を 調べるため 新しく打ち上げられたジェット機から 発射されたと推測する
- この検出がTDFにおけるジェットの共通点に与える影響を調べる.
主な方法:
- 特定のTDFの多波長観測
- 微弱な放射を検出するための 感受性の高い無線フォローアップ観測
- 観測された性質を,蓄積とジェット発射の理論モデルと比較する.
主要な成果:
- 熱的TDFからの変数放射の検出
- ラジオ放射の性質は,恒星質量ブラックホールの蓄積状態で見られるものと類似しています.
- ラジオ観測の感度は,以前の上限より大幅に高い.
結論:
- 検出された無線放射は,TDFに関連した新発射ジェットから発信されたと解釈されています.
- これは,すべてのTDFに伴うジェットが一般的な現象である可能性を示唆しています.
- ラジオ観測の 感度が高まったことが 今までの検出を 逃れた理由を説明しています
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