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エクリプスする二重星系における赤の巨星を剥がした恒星の多周期脈動
Pierre F L Maxted1, Aldo M Serenelli, Andrea Miglio
1Astrophysics Group, Keele University, Keele, Staffordshire ST5 5BG, UK. p.maxted@keele.ac.uk
Nature
|June 28, 2013
まとめ
質量が少ない白矮星
科学分野:
- 天体物理学 天体物理学
- 恒星の進化について
背景:
- 低質量白矮星は,二重星系における赤い巨星の残骸である.
- それらの冷却速度は,水素融合により異なるが,この二分法は完全に理解されていない.
- これは,パルサーの時計や極端な環境の探査機としての使用を制限しています.
研究 の 目的:
- 低質量白矮星前身の質量と半径を正確に測定するために.
- 白矮星の冷却速度に影響を与える要因を理解するために.
- エキゾチックな二重星系の形成を調査する.
主な方法:
- 白い矮星の前身の精密な質量と半径の測定.
- 観測データと一致する恒星モデリング.
- 内部プロセスを推論するために,脈動周波数の分析.
主要な成果:
- 先駆星は,観測データと一致するために厚い水素の封筒を必要とします.
- 非常に冷たい白矮星は,パルサー放射線や砲弾の閃光によって,おそらくその封筒を失った.
- 新しいタイプの脈動星の前駆体が見つかりました.
結論:
- 厚い水素包膜は,低質量白矮星の進化に不可欠である.
- パルサー照射または不安定な融合は,冷たい白矮星における封筒の損失を説明する.
- パルス分析は,シェルフラッシュ現象の洞察を提供します.
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