Revisiting the Fundamental Parameters of 49 New Star Clusters in Gaia DR2

Abstract Reliable fundamental parameters of star clusters such as distance modulus, metallicity, age, extinction, and binary fraction are key importance for astrophysical studies. Although a lot new were identified from the data of, e.g., Gaia Data Release 2 (Gaia DR2), many not determined reliably. This work makes use photometry DR2 good color–magnitude diagram (CMD) analysis tool, Powerful CMD, to determine 49 in detail. All CMDs fitted carefully by both statistics eye, make sure reproduced well possible. As result, 22 reliably, those others also we can. Because width main sequence color direction is used, combined with other widely used CMD features constrain parameters, results this more reliable than reported single-star isochrone fits. feature work, primordial fractions rotating have been reported, which useful works, particular some simulation research.