arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.00751astro-ph.SR
收藏

两个北天疏散星团 DOLIDGE 14 和 NGC 1960 视场内变星的光度学搜索

Photometric Search for variable stars in the field of two Northern open clusters, DOLIDGE 14 and NGC 1960

Gireesh C. Joshi

备注：
Classification of identified variable stars is not correct
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

AI总结：

本工作利用次级标准转换和较差测光法分析 NGC 1960 和 DOLIDZE 14 视场内的恒星光变曲线，发现了 22 颗变星，并通过周期分析、成员星分析和 C-M 图确认了它们的分类与演化状态。

摘要：

本工作的目的是提取并分析两个星团（NGC 1960 和 DOLIDZE 14）视场内恒星的光变曲线。通过次级标准转换和较差测光法（每个候选变星使用两颗比较星）的综合方法进行了测光定标。展示了每个潜在变星的光变曲线，并用两种不同方法分析了它们的周期。讨论了 NGC 1960 中发现的 18 颗短周期变星的周期和分类，其中包括 4 颗已知变星和 14 颗新变星。在 DOLIDZE 14 中，发现的 4 颗变星包括 1 颗杂项型、1 颗自转变星和 2 颗食双星型变星。在 NGC 1960 中，选出的 12 颗比较星可能是长周期变星的候选星，4 颗恒星可能是标准星。其他 20 颗比较星的亮度变化呈非脉动且不规则的形态。利用变星的距离、运动学概率及其在 $(U-B)$ 对 $(B-V)$ 双色图（TCD）中的位置进行了成员星分析。构建了 C-M 图以确认新变星的演化状态。

英文摘要：

The aim of present work is extract and analyses the light curves of the stars in the field of two clusters, NGC 1960 and DOLIDZE 14. The photometric calibration is performed by comprehensive method of secondary standard transformation and differential photometry using two comparison stars per candidate variable star. The resultant light curves for each potential variable star are displayed and their period analyzed by two different methods. The period and classification of 18 discovered short periodic type variable stars of NGC 1960 are discussed, which consist of four known variable stars and fourteen new variable stars. In the case of DOLIDZE 14, four discovered variables consist of one miscellaneous, one rotational, two $binary$ type variable stars. In the case of NGC~1960, the 12 selected comparison stars appear to be likely candidate for long periodic variability and 4 stars may be standard stars. The variation in brightness of other twenty comparison stars is non-pulsating with an irregular pattern. Membership analysis of variable stars is performed using their distance, kinematic probability and location in $(U-B)$ vs $(B-V)$ TCD. C-M diagrams were constructed to confirm the evolutionary state of the new variable stars.

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。

↑