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ノバ・スコルピーの子孫の正規運動年代測定 AD 1437
M M Shara1,2, K Iłkiewicz3, J Mikołajewska3
1Department of Astrophysics, American Museum of Natural History, Central Park West and 79th Street, New York, New York 10024, USA.
Nature
|September 1, 2017
まとめ
多くの古い新星は 破滅的な変数の一種で 噴火の間 矮星新星に変化します この研究で1437年の古典的な新星系が発見され 現在では小惑星の新星の振る舞いを示し この進化的リンクを裏付けている.
科学分野:
- * 天体物理学
- * 星の進化
- * バイナリーシステム
背景:
- クラシックな新星のように 爆発する傾向がある 白い矮星を持つ二重系です
- * クラシックな新星は,白矮星での熱核反応によって発生し,高輝度に達します.
- *ノヴァのような二重星と矮星は 性質は同じですが 質量移転速度は違います これは長年の謎です
研究 の 目的:
- * クラシック新星と矮星新星との進化的関連を調べる
- * クラシックな新星噴火後のシステムの長期的行動を理解する.
- * 類似の軌道周期で共存する新星型と小新星系のパズルを解くために
主な方法:
- * AD 1437の古典的な新星噴火の基礎となるバイナリシステムの回復と年齢の確認.
- * システムの年齢を独立して確認するために適切な動作の年代測定.
- * 回復したシステムにおける現在の噴火行動 (矮星新星爆発) の観測.
主要な成果:
- * AD 1437の古典的な新星噴火のバイナリシステムは,成功裏に回復されました.
- 噴火から500年近く経った今 この星系は 小惑星の新星爆発を示しています
- * 他の3つの古典的な新星も,新星殻を示し,現在矮星新星として観測されています.
結論:
- * 古い古典的な新星は,繰り返される新星噴火の間に長い期間,矮星新星に進化します.
- * この進化の経路は,新星型と小新星系の共存を説明します.
- * 観測された行動は,大災害の変数系内の周期的な進化を支持する.
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