基于LAMOST对银河系厚盘恒星轨道偏心率及厚盘形成机制的研究
发布时间：2019-07-12 08:53
【摘要】：基于LAMOST光谱数据,选取一个太阳邻域F/G型主序星样本研究银河系厚盘恒星的轨道偏心率分布.厚盘星是基于空间位置和金属丰度[Fe/H]来证认,同时分析薄盘星的污染带来的影响.发现厚盘恒星轨道偏心率分布在低偏心率(约为0.2)处有一个峰值,而且向高偏心率延伸一个尾巴(到e~0.8).把得到的厚盘恒星偏心率分布与4个厚盘形成模型进行对比,发现此结果与富气体并合模型最为符合.
[Abstract]:Based on LAMOST spectral data, a solar neighborhood F / G main sequence star sample is selected to study the orbital eccentricity distribution of thick disk stars in the Milky way. The thick disk star is based on the spatial position and metal abundance [Fe/H], and the influence of the pollution of the thin disk star is analyzed at the same time. It is found that the orbital eccentricity of a thick disk star has a peak at low eccentricity (about 0.2) and extends a tail to high eccentricity (to e 鈮，
本文编号：2513598
[Abstract]:Based on LAMOST spectral data, a solar neighborhood F / G main sequence star sample is selected to study the orbital eccentricity distribution of thick disk stars in the Milky way. The thick disk star is based on the spatial position and metal abundance [Fe/H], and the influence of the pollution of the thin disk star is analyzed at the same time. It is found that the orbital eccentricity of a thick disk star has a peak at low eccentricity (about 0.2) and extends a tail to high eccentricity (to e 鈮，
本文编号：2513598
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