WFCAM多波长变星星表
The WFCAM Multi-wavelength Variable Star Catalog
摘要：
近红外（NIR）中的恒星变异性在很大程度上尚未探索。利用数据挖掘方法开发公共科学档案为近红外天空的时域探索提供了一个视角。我们执行一个全面的搜索恒星的变化使用的光学近红外多波段光度数据在WFCAM科学档案馆（WSA）的公共校准数据库，其目的是有助于一般普查的变星，并延长目前稀缺的库存准确的近红外光变曲线的一些变星类。我们引入了为多波段数据设计的新的相关采样变率指数，并将其应用于预先选择变星候选者，即，光变曲线由相关变化主导，而不是由噪声主导。预选标准建立了强大的数值试验，用于评估响应的变异性指数的有色噪声特性的数据。我们发现275个周期性变星和另外44个可疑的不确定周期或明显的非周期性变化的变化对象。其中只有44颗是已知的，包括11颗位于球状星团M3（NGC~5272）外围的RR~天琴座星。我们提供了一个初步的分类新的变星，有良好的测量光变曲线，但大量的对象的变化类型仍然模糊不清。我们将大部分新变星归类为接触双星，但也发现了几颗脉动星，其中34颗可能是新的区域RR~天琴座，3颗可能是造父变星。我们还确定了32个高度变红的变星靠近以前已知的暗星云，这表明这些是嵌入的年轻恒星。我们将我们的结果和所有的光变曲线数据作为WFCAM变星星表发表。
英文摘要：
Stellar variability in the near-infrared (NIR) remains largely unexplored. The exploitation of public science archives with data-mining methods offers a perspective for the time-domain exploration of the NIR sky. We perform a comprehensive search for stellar variability using the optical-NIR multi-band photometric data in the public Calibration Database of the WFCAM Science Archive (WSA), with the aim of contributing to the general census of variable stars, and to extend the current scarce inventory of accurate NIR light curves for a number of variable star classes. We introduce new variability indices designed for multi-band data with correlated sampling, and apply them for pre-selecting variable star candidates, i.e., light curves that are dominated by correlated variations, from noise-dominated ones. Pre-selection criteria are established by robust numerical tests for evaluating the response of variability indices to colored noise characteristic to the data. We find 275 periodic variable stars and an additional 44 objects with suspected variability with uncertain periods or apparently aperiodic variation. Only 44 of these objects had been previously known, including 11 RR~Lyrae stars in the outskirts of the globular cluster M3 (NGC~5272). We provide a preliminary classification of the new variable stars that have well-measured light curves, but the variability types of a large number of objects remain ambiguous. We classify most of the new variables as contact binary stars, but we also find several pulsating stars, among which 34 are probably new field RR~Lyrae and 3 are likely Cepheids. We also identify 32 highly reddened variable objects close to previously known dark nebulae, suggesting that these are embedded young stellar objects. We publish our results and all light-curve data as the WFCAM Variable Star Catalog.
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。
