通过LAMOST观察到的晚型接触二进制系统的物理特征:全面的统计分析
H I Abdel Rahman1, Mohamed Darwish2
1Astronomy Department, National Research Institute of Astronomy and Geophysics, Helwan, Cairo, 11421, Egypt.
本研究目录了1800个日食 W UMa 系统 (EW),分析了它们的物理特性. 结果证实,EW系统主要是晚期类型的恒星,ZTF目录周期显示出良好的相关性,与VSX周期不同.
科学领域:
- 天文学和天体物理学
- 恒星进化 恒星进化
- 双星系统是双星系统.
背景情况:
- 遮蔽双星,特别是W Ursae Majoris (EW) 系统,对于理解恒星进化至关重要.
- 之前的研究对大型电子电气系统样本的物理性质提供了有限的统计见解.
研究的目的:
- 创建一个大约1800个EW系统的综合目录.
- 对EW系统的关键物理参数进行详细的统计分析.
- 为了研究轨道周期和大气参数之间的相关性.
主要方法:
- 使用来自LAMOST,VSX,ZTF和Gaia的数据编译目录.
- 统计分析包括频率分布,置信区间和假设测试.
- 检查光谱类型,有效温度,表面重力,金属性和辐射速度.
主要成果:
- 平均EW系统参数:周期 (0.377天),有效温度 (5775K),日志 (表面重力) (4),金属性 (-0.185) 和辐射速度 (-4.085公里/秒).
- 大多数EW系统是晚期类型的恒星 (F,G,K光谱类型);88个系统是A型 (7400 K).
- ZTF目录时期与已建立的关系相关性很好 (0.74),而VSX目录时期的相关性较弱.
结论:
- 该目录为EW系统研究提供了坚实的统计基础.
- 电子电报系统在定义的统计界限内表现出特有的物理特性.
- VSX目录需要修订,以提高EW系统周期的准确性.
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