長い間求められてきた共通エンベロープイベントの特定
N Ivanova1, S Justham, J L Avendano Nandez
1Department of Physics, University of Alberta, Edmonton, AB T6G 2E7, Canada. nata.ivanova@ualberta.ca
Science (New York, N.Y.)
|January 26, 2013
まとめ
共通のエンベロープイベント (CEE) は,近い二重星を形成するのに極めて重要です. この研究では,CEEの直接観測シグネチャーを提案し,宇宙で観測された赤色の一時的な爆発に匹敵する.
科学分野:
- 天体物理学 天体物理学
- 恒星の進化について
- バイナリー・スター・システム バイナリー・スター・システム
背景:
- 共通のエンベロープイベント (CEEs) は,近い二重星を作るのに不可欠であると理論化されていますが,直接的な観測証拠は不足しています.
- これまでのCEEの証拠は間接的であり,CEEの形成のためにそのようなイベントを必要とするシステムの存在に依存していた.
- CEEを理解することは,宇宙で観察された様々な密接なバイナリ構成の流行を説明する鍵です.
研究 の 目的:
- 共通エンベロープイベント (CEE) の直接観測シグネチャーを提案する.
- CEE中に放出された物質からの排出を説明する物理モデルを提示する.
- 理論的な予測を観測された天文現象と結びつける.
主な方法:
- 物質の冷却中に再結合フロントによって排出が支配されるCEEの物理モデルを開発した.
- タイムスケール,エネルギー,色,光曲線形状,射出速度など,このモデルの予測された観測特性を分析した.
- これらの予測を,最近特定された赤色一時的な爆発のクラスの観測された性質と比較した.
主要な成果:
- 提案された物理モデルは,共通のエンベロープのイベントと一致する観測シグネチャを成功裏に予測します.
- 放射時間スケール,エネルギー出力,スペクトル色,光曲線形質,射出速度などの主要な特徴は,観測された赤色一時的な爆発と一致しています.
- このモデルは,これらの一時的な出来事の起源について,妥当な説明を提供します.
結論:
- この研究は,共通エンベロープイベント (CEE) の最初の直接観測シグネチャを提供している.
- 赤色の一時的な発作は,CEEの見込みのある症状として特定されています.
- この研究は,バイナリ進化の理論的モデルと直接的な天文観測の間のギャップを埋めています.
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