The WFCAM multiwavelength Variable Star Catalog
The WFCAM multiwavelength Variable Star Catalog
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WFCAM 多波长变星目录
DOI：
10.1051/0004-6361/201423793
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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
恒星近红外（NIR）的变异性在很大程度上仍未被探索。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。目的利用WFCAM科学档案（WSA）的公共校准数据库中的光学-近红外多波段光度数据，对恒星变异性进行全面的搜索，目的是对变星的总体普查做出贡献，并扩展当前稀缺的精确近红外光曲线库存。方法采用标准数据挖掘方法对WSA时间序列数据进行提取和微调。我们引入了针对相关采样的多波段数据设计的新的变异性指标，并将其应用于从噪声为主的候选变星中预选以相关变化为主的光曲线。通过稳健的数值试验建立了预选择准则，以评估变异性指标对数据彩色噪声特性的响应。我们使用字符串长度最小化方法对由变异性指数预先选择的6551个候选变星初始目录进行周期搜索。进一步的频率分析进行了积极的候选人使用另外三种方法的组合，以应对混叠。结果发现275颗周期变星，另有44颗具有不确定周期或明显非周期变化的疑似变星。其中只有44颗是已知的，包括位于球状星团m3 （NGC 5272）外围的11颗天琴座RR星。我们对具有良好测量光曲线的新变星提供了初步分类，但大量物体的变星类型仍然不明确。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颗可能是新的天琴座RR星，3颗可能是造父变星。我们还在先前已知的暗星云附近发现了32个高度变红的可变物体，这表明它们是嵌入的年轻恒星物体。我们公布了我们的结果和所有的光曲线数据作为WFCAM变星目录。
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.
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宇宙中的超新星
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
Kohsuke Sumiyoshi;Shigehiro Nagataki;山田章一;Shoichi Yamada;Shoichi Yamada;Shoichi Yamada;山田章一;Shoichi Yamada
通讯作者：
Shoichi Yamada
南部四个疏散星团的四色和 H-β 光度测量
DOI：
--
发表时间：
1981
期刊：
影响因子：
--
作者：
P. Stetson
通讯作者：
P. Stetson
改进大型光度数据集中的变量星搜索：BEST II 检测到 CoRoT 场 LRa02 中的新变量
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
T. Fruth;P. Kabáth;J. Cabrera;R. Chini;S. Csizmadia;P. Eigmüller;A. Erikson;S. Kirste;R. Lemke;M. Murphy;T. Pasternacki;H. Rauer;R. Titz
通讯作者：
R. Titz
Messier 3 中天琴座 RR 星的长期光度监测
DOI：
--
发表时间：
2011
期刊：
影响因子：
--
作者：
J. Jurcsik;G. Hajdu;B. Szeidl;K. Ol'ah;J. Kelemen;'A. s'odor;A. Saha;P. Mallick;J. Claver
通讯作者：
J. Claver
DOI：
10.1111/j.1365-2966.2009.15396.x
发表时间：
2009
影响因子：
4.8
作者：
Cross N
通讯作者：
Cross N