2000/02/23 by K. P. Tian, Tian, K. P., C. G. Shu +9
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0002423
20 pages, Latex, 7 figures, submitted to A&A
arxiv created 2000/02/23 · arxiv updated 2016/08/30
Photographic photometries of 789 stars in the region of the open clusters NGC1750 and NGC1758 are derived from a set of 8 photometric plates. According to the astronomical data including proper motions, positions and membership probabilities of individual stars, several astrophysical parameters for these two clusters are determined, such as HR diagrams, ages, distances, luminosity functions, masses and kinematics, etc. It is found that the distances are (525± 48pc) and (794± 73pc) with ages of 1.5×108yr and 6.3×108yr for NGC1750 and NGC1758 respectively. Both clusters show no significant mass segregation effects because of their relatively young ages. The analysis of the proper motions imply that their velocity distributions are isotropy.