銀河の中心にある430パーセックのバイポラー電波の膨らみ
I Heywood1,2,3, F Camilo4, W D Cotton5,6
1Department of Physics, University of Oxford, Oxford, UK. ian.heywood@physics.ox.ac.uk.
Nature
|September 13, 2019
まとめ
ラジオ画像は銀河の中心近くの 巨大な双極性バブル構造を明らかにした このエネルギッシュなイベントは 過去の爆発から 泡を作り出し 恐らくこの地域のシンクロトロン放出を推進した
科学分野:
- 天体物理学
- 銀河天文学
- 高エネルギー現象
背景:
- 銀河の中心には 超大質量ブラックホールと 独特の密度の高いガス環境があります
- ブラックホールとガスの密度による 爆発的なエネルギーと 恒星形成の証拠が存在します
- 銀河中心の内部は 高い宇宙線イオン化,異常な化学反応, 未知の起源の放射性フィラメントを 呈している.
研究 の 目的:
- 銀河の中心にある 磁気フィラメントの起源を調査する
- 銀河の中心と関連した 大規模なエネルギー現象を特徴づける
主な方法:
- 先進的なラジオ画像技術を使って 銀河の中心部地域をマップした
- 新しく発見された構造の形状と性質を分析した.
主要な成果:
- 銀河の平面の上と下に 1x3 度 (140x430 パーセック) の大きな双極性バブル構造を発見した.
- 構造は縁が明るく 縁が交差していて シンメトリーで エネルギーのあるイベントの起源を示唆しています
- 推定バブルの年齢は数百万年で 総エネルギーは7×10^52エルグです
結論:
- 双極性バブルは 銀河の中心にある 過去のエネルギー事件によって 形成された可能性が高い
- このイベントは,宇宙線密度の増加の重要な源であると仮定されています.
- このイベントは,近くのラジオフィラメントのシンクロトロン放射を駆動する相対性粒子の主な源です.
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