The WFCAM multiwavelength Variable Star Catalog (Corrigendum)
The WFCAM multiwavelength Variable Star Catalog (Corrigendum)
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WFCAM 多波长变星目录（勘误表）
DOI：
10.1051/0004-6361/201423793e
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发表时间：
2015
影响因子：
6.5
通讯作者：
Ferreira Lopes C
中科院分区：
文献类型：
--
作者：
Ferreira Lopes C
近红外（NIR）中的恒星变异性在很大程度上尚未探索。公共科学档案与数据挖掘方法的开发利用提供了一个视角的时域探索的近红外sky.AimsWe执行全面的搜索使用的光学近红外多波段光度数据在公共校准数据库的WFCAM科学档案（WSA），其目的是为变星的普查做出贡献，并为一些变星扩展目前稀缺的精确近红外光变曲线库存。星星类。MethodsStandard数据挖掘方法应用于提取和微调时间序列数据从WSA。我们引入了为多波段数据设计的新的相关采样变率指数，并将其应用于预选可变星星候选者，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指数的有色噪声特性的数据。我们进行了一个周期的搜索，使用字符串长度最小化方法的初始目录的6551可变星星候选人预选的变化指数。进一步的频率分析进行了积极的候选人使用三个额外的方法相结合，以科普aliasing.ResultsWe发现275周期变星和另外44个可疑的变化与不确定的周期或明显的非周期性变化的对象。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型天琴座恒星。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。我们将大多数新变星归类为接触双星，但我们也发现了几颗脉动星，其中34颗可能是新领域的天琴座RR，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光变曲线数据作为WFCAM变星星星目录发布。
ContextStellar variability in the near-infrared (NIR) remains largely unexplored. The exploitation of public science archives with data-mining methods offers a perspective for a time-domain exploration of the NIR sky.AimsWe perform a comprehensive search for stellar variability using the optical-NIR multiband 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 of extending the current scarce inventory of accurate NIR light curves for a number of variable star classes.MethodsStandard data-mining methods were applied to extract and fine-tune time-series data from the WSA. We introduced new variability indices designed for multiband data with correlated sampling, and applied them for preselecting variable star candidates, i.e., light curves that are dominated by correlated variations, from noise-dominated ones. Preselection criteria were established by robust numerical tests for evaluating the response of variability indices to the colored noise characteristic of the data. We performed a period search using the string-length minimization method on an initial catalog of 6551 variable star candidates preselected by variability indices. Further frequency analysis was performed on positive candidates using three additional methods in combination, in order to cope with aliasing.ResultsWe 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 on the outskirts of the globular cluster M 3 (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.
使用地基广角成像仪进行星团天体测量
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
P. Seidelmann;A. Monet;L. Bedin;Jay Anderson;G. Piotto;Y. Momany;R. S. Yadav
通讯作者：
R. S. Yadav
VVV 调查中的恒星变异性：概述和初步结果
DOI：
10.1017/s1743921313014725
发表时间：
2014
期刊：
Proceedings of the International Astronomical Union
影响因子：
--
作者：
Catelan M
通讯作者：
Catelan M