摘要
介绍了简单星族的定义和星族合成方法；简述了蓝致密星系的观测特征和研究意义；列出了我们利用北京天文台２ ．１６ ｍ 望远镜已成功观测蓝致密星系样本。在此基础上，我们运用恒星团星族合成方法，分析了一些蓝致密星系的光学谱。给出了它们中年龄和金属丰度不同的星族对星系５８７ｎｍ 处连续谱流量贡献的百分比；同时还给出星系内部恒星形成的历史和内红化值。
In this paper, we introduce the definition of stellar cluster and the stellar population synthesis method first. Then we described the observation properties, the importance of Blue Compact Galaxies (BCGs) study, and list the BCGs sample that have been observed with the 2.16m telescope at the Xinglong Station of Beijing Astronomical Observatory (BAO). On the basis of this, we apply the population synthesis method based on star cluster integrated spectra to some BCGs optical spectra. Using the population synthesis method, we know not only the stellar population (different ages and metallicities) percentage contributions at λ=587.0nm for each BCGs, but also the star formation history and the interstellar reddening value of these galaxies.
关键词
星族合成
蓝致密星系
光学谱
年龄
金属丰度
stellar population, stellar population synthesis, blue compact galaxies
