膨張する WR140 粉殻の放射線駆動加速
Yinuo Han1,2, Peter G Tuthill3, Ryan M Lau4,5
1Institute of Astronomy, University of Cambridge, Cambridge, UK. yinuo.han@ast.cam.ac.uk.
Nature
|October 12, 2022
まとめ
WR140のようなウルフ・ライエット (WR) の星は,衝突する恒星風で塵を生成します. 新しい画像は 塵の加速を明らかにし 均一な流出モデルに挑戦し この二進体系の複雑な状態を示しています
科学分野:
- 天文学
- 天体物理学
- スター進化
背景:
- WR140のようなウォルフ・ライエット (WR) バイナリシステムは,エピソード的な塵の生成で知られています.
- 塵の形成は 衝突する恒星風で起こります 軌道運動によって大きな円弧に 形成されます
- WR140の最適な塵生成条件は,主にペリアストロンの近くで見られる.
研究 の 目的:
- WR140の周りの星周塵の多層画像を提示する.
- 粉塵の膨張と構造を分析する
- 衝突する風のバイナリにおける塵形成の物理的条件とダイナミクスを調査する.
主な方法:
- WR140のダストシェルの多層画像の取得.
- 塵の膨張を追跡するための幾何学的なモデルの構築.
- 加速を含む塵の運動分析
主要な成果:
- 複雑な塵雲の膨張を 精確に計測しています
- 粉塵の膨張は均一ではなく 加速を示しています
- 複雑な軌道変調効果は,塵の生成のための"ゴールドロックスゾーン"を作成することができます.
結論:
- 観測された塵の加速は,放射線圧力効果の直接的な動力学的証拠を提供します.
- 観測された塵の動態を説明するには,単純な均一速度の流出モデルが不十分です.
- WR140のような衝突する風のバイナリは 塵の形成と進化に影響を与える複雑な物理的条件を示しています
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