arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.08662astro-ph.SRastro-ph.GA
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周期变星的Zwicky瞬变设施星表

The Zwicky Transient Facility Catalog of Periodic Variable Stars

Xiaodian Chen, Shu Wang, Licai Deng, Richard de Grijs, Ming Yang, Hao Tian

备注：
accepted by ApJS. The full catalog and LCs can be accessed at http://variables.cn:88/ztf/ or doi.org/10.5281/zenodo.3886372
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摘要：

近年来，已知的周期变星的数量迅速增加。由于其大视场和微弱的极限星等，ZTF（Zwicky Transient Facility）提供了一个独特的机会来探测北部天空中的变星。在这里，我们利用ZTF数据发布2（DR 2）搜索和分类变量下降到r ~ 20.6磁。我们分类781,602周期变量分为11个主要类型，使用改进的分类方法。与先前公布的星表比较，621，702个天体（79.5%）是新发现或新分类的，包括~700颗造父变星、~5000颗天琴座RR型星、~ 15，000颗盾牌座δ变星、~ 350，000颗食双星、~ 100，000颗长周期变星和大约150，000颗自转变星。典型的错误分类率和周期准确度分别为2%和99%。我们74%的变星位于银河系纬度，$|b|<10^\circ$。这个包含造父变星、天琴座RR型、盾牌座δ型恒星和接触（EW型）食双星的大样本有助于研究银河系的盘结构和演化，其完整性、区域覆盖率和年龄分辨率都有所提高。具体来说，北部翘曲和磁盘的边缘在15- 20千秒差距的距离明显比以前更好地覆盖。在转动变星中，犬RS型和天龙座BY型变星可以很容易地分离出来。我们对恒星色球活动的了解将大大受益于对这些类型变量的统计分析。

英文摘要：

The number of known periodic variables has grown rapidly in recent years. Thanks to its large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a unique opportunity to detect variable stars in the northern sky. Here, we exploit ZTF Data Release 2 (DR2) to search for and classify variables down to r ~ 20.6 mag. We classify 781,602 periodic variables into 11 main types using an improved classification method. Comparison with previously published catalogs shows that 621,702 objects (79.5%) are newly discovered or newly classified, including ~700 Cepheids, ~5000 RR Lyrae stars, ~15,000 Delta Scuti variables, ~350,000 eclipsing binaries, ~100,000 long-period variables, and about 150,000 rotational variables. The typical misclassification rate and period accuracy are on the order of 2% and 99%, respectively. 74% of our variables are located at Galactic latitudes, $|b|<10^\circ$. This large sample of Cepheids, RR Lyrae, Delta Scuti stars, and contact (EW-type) eclipsing binaries is helpful to investigate the Galaxy's disk structure and evolution with an improved completeness, areal coverage, and age resolution. Specifically, the northern warp and the disk's edge at distances of 15--20 kpc are significantly better covered than previously. Among rotational variables, RS Canum Venaticorum and BY Draconis-type variables can be separated easily. Our knowledge of stellar chromospheric activity would benefit greatly from a statistical analysis of these types of variables.

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。

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