在爆发恒星Nova Vul 1670中的核灰和流出
Tomasz Kamiński1, Karl M Menten2, Romuald Tylenda3
11] European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile [2] Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
Nature
|March 25, 2015
概括
在CK Vulpeculae中使用.
科学领域:
- 天文学 天文学
- 天体物理学 天体物理学
- 恒星进化 恒星进化
背景情况:
- CK Vulpeculae (CK Vul) 在1670-1672年经历了一次爆发,在历史上被归类为Nova Vul 1670.
- 它的性质受到争论,因为它与发光的"红色过渡体"有相似之处,可能是由恒星碰撞造成的,而不是经典的新星.
- 以前的观测显示出双极星云和无线电连续源,但没有可见的恒星对应物.
研究的目的:
- 研究CK Vulpeculae周围材料的组成和来源.
- 要确定CK Vulpeculae是新星还是另一种类型的恒星事件,例如合并.
主要方法:
- 对CK Vulpeculae周围化学丰富的分子气体和尘埃的分析.
- 检查气体内特殊的同位素比率.
- 周围气体的质量估计,包括CO观测转换的不确定性.
主要成果:
- 在外流中,CK Vulpeculae被化学上丰富的分子气体和尘埃所包围.
- 该气体呈现出不寻常的同位素比率,表明从燃烧"核灰"中的气中得到丰富.
- 化学成分和估计的气体质量与新星或其他已知的恒星爆炸不一致.
结论:
- 观察到的CK Vulpeculae的特征不能用经典的新星或其他已知的爆炸事件来解释.
- 奇特的化学成分和大量的气体质量强烈地表明CK Vulpeculae是两个恒星合并的残余物.
- 这些发现将CK Vulpeculae从潜在的新星重新归类为可能的恒星合并事件.
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