【摘要】 采用双星族演化合成模型对M31(仙女座大星云)中24个球状星团进行了研究.结果表明:这些球状星团的年龄都大于1.5Gyr,有83.3%以上的球状星团的年龄在4.0Gyr以上;而金属丰度都小于0.0240,有87.5%的星团的金属丰度小于等于0.0090,62.5%的星团的金属丰度小于等于0.0040.整个样本球状星团的平均年龄和平均金属丰度分别为8.4Gyr和0.0067,总体上该样本球状星团的年龄较老,贫金属丰度,这与目前球状星团主流研究结果一致.更多还原

【Abstract】 Twenty-four Globular Clusters(GCs) are studied using a binary population synthesis model.The results show that: all the sample GCs have ages older than 1.5 Gyr,and more than 83.3% GCs are older than 4.0 Gyr.The metallicities of the GCs are smaller than 0.0240,and 87.5% GCs′ metallicities are smaller than 0.0090,62.5% GCs′ metallicities are smaller than 0.0040.The averages of stellar age and metallicity are 8.4 Gyr and 0.0067.Therefore,the sample GCs are old and metal-poor.It agrees with most other results.更多还原