论文标题
集群年龄实验(情况)。球状簇M10场中的可变恒星
The Cluster AgeS Experiment (CASE). Variable stars in the field of the globular cluster M10
论文作者
论文摘要
在搜索可变恒星的过程中,在1998年至2015年之间监测了球状簇M10(NGC 6254)的田地。 V-光曲线是针对40个变量或可能变量的40个变量得出的,其中大多数是新检测。在案例项目中获得的正确运动表明,有18个新检测到的变量和14个以前已知的变量是群集的成员或可能的成员,包括1个RRC型,3个II型头孢菌素和14个SX PHE型脉动器,一个接触型二进制二进制二进制二进制二进制二进制二进制型和6个半度性红色巨人。作为搜索的副产品,我们发现了一个由主序列恒星组成的候选二进制二进制,记录轨道周期为0.042 d。我们还证实了Shishkovsky等人暗示的红色Straggler M10-VLA1的光度变异性。 (2018年),他从光谱上发现了此对象。在附录1中,我们表明,适当的运动测量与从Gaia档案中检索的情况非常吻合,而附录2则提供了属于M10的SX PHE恒星中低频γ多拉德斯型振荡的证据。
The field of the globular cluster M10 (NGC 6254) was monitored between 1998 and 2015 in a search for variable stars. V -light curves were derived for 40 variables or likely variables, most of which are new detections. Proper motions obtained within the CASE project indicate that 18 newly detected variables and 14 previously known ones are members or likely members of the cluster, including one RRc-type, three type II Cepheids, and 14 SX Phe-type pulsators, one contact binary, and six semi-regular red giants. As a byproduct of the search we discovered a candidate binary comprised of main sequence stars with the record-short orbital period of 0.042 d. We also confirmed the photometric variability of the red straggler M10-VLA1 hinted at by Shishkovsky et al. (2018), who discovered this object spectroscopically. In Appendix 1 we show that CASE proper motion measurements are in a good agreement with those retrieved from the Gaia archive, while Appendix 2 presents evidence for low frequency γ Doradus-type oscillations in SX Phe stars belonging to M10.