监测项目：M50中低质量恒星的旋转周期
The Monitor project: Rotation periods of low-mass stars in M50
摘要：
我们报告的时间序列测光调查的结果M50（NGC 2323），一个~130百万年的疏散星团，进行了使用CTIO 4米布兰科望远镜和Mosaic-II探测器作为监视器项目的一部分。在0.2 <~ M/Msol <~ 1.1的质量范围内，对812个候选星团成员的自转周期进行了推导.旋转周期分布显示出明显的质量依赖的形态，从统计上看，与NGC 2516和M35中的那些没有区别。由于三次观测运行的数据可用性相隔约10个月和1个月的时间尺度，我们能够证明在10个月的间隔内光度振幅演变的明确证据，因此斑点图案，尽管我们无法详细限制这些效应的时间尺度，因为我们的采样中的大间隔造成的限制，阻止使用相位信息。
英文摘要：
We report on the results of a time-series photometric survey of M50 (NGC 2323), a ~130 Myr open cluster, carried out using the CTIO 4m Blanco telescope and Mosaic-II detector as part of the Monitor project. Rotation periods were derived for 812 candidate cluster members over the mass range 0.2 <~ M/Msol <~ 1.1. The rotation period distributions show a clear mass-dependent morphology, statistically indistinguishable from those in NGC 2516 and M35 taken from the literature. Due to the availability of data from three observing runs separated by ~10 and 1 month timescales, we are able to demonstrate clear evidence for evolution of the photometric amplitudes, and hence spot patterns, over the 10 month gap, although we are not able to constrain the timescales for these effects in detail due to limitations imposed by the large gaps in our sampling, preventing use of the phase information.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
