Powerful CMD: a tool for color-magnitude diagram studies

Zhong-Mu Li, Cai-Yan Mao, Qi-Ping Luo, Zhou Fan, Wen-Chang Zhao, Li Chen, Ru-Xi Li, Jian-Po Guo
2017 Research in Astronomy and Astrophysics  
We present a new tool for colour-magnitude diagram (CMD) studies, Powerful CMD. This tool is built on the basis of the advanced stellar population synthesis (ASPS) model, in which single stars, binary stars, rotating stars, and star formation history have been taken into account. Via Powerful CMD, the distance modulus, colour excess, metallicity, age, binary fraction, rotating star fraction, and star formation history of star clusters can be determined simultaneously from observed CMDs. The new
more » ... tool is tested via both simulated and real star clusters. Five parameters of clusters NGC6362, NGC6652, NGC6838 and M67 are determined and compared to other works. It is shown that this tool is useful for CMD studies, in particular for those with the data of the Hubble Space Telescope (HST). Moreover, we find that the inclusion of binaries in theoretical stellar population models may lead to smaller colour excess compared to the case of single star population models.
doi:10.1088/1674-4527/17/7/71 fatcat:kl5gzji3yfhd5kipbid5idz3pe