Contemporaneous Imaging Comparisons of the Spotted Giant σ Geminorum Using Interferometric, Spectroscopic, and Photometric Data
Contemporaneous Imaging Comparisons of the Spotted Giant σ Geminorum Using Interferometric, Spectroscopic, and Photometric Data
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DOI：
10.3847/1538-4357/aa8ef7
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发表时间：
2017-09
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影响因子：
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通讯作者：
R. Roettenbacher;J. Monnier;H. Korhonen;R. Harmon;F. Baron;T. Hackman;G. Henry;G. Schaefer;K. Strassmeier;M. Weber;T. Brummelaar
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文献类型：
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作者：
R. Roettenbacher;J. Monnier;H. Korhonen;R. Harmon;F. Baron;T. Hackman;G. Henry;G. Schaefer;K. Strassmeier;M. Weber;T. Brummelaar
附近的活动恒星具有相对较快的自转和大的星斑结构，为比较干涉成像、光谱成像和光度成像技术提供了机会。在本文中，我们首次用三种不同的方法成像了一颗斑点恒星。对RS Canum Venaticorum BaryσGineorum(σ宝石)的巨型主星进行了干涉、高分辨率光谱和光度观测两个时期的成像。重建得到的光曲线与观测光曲线具有很好的一致性，得到了不同地图上纵向一致的光斑特征的支持。然而，这些方法在地点纬度上存在着强烈的分歧。
Nearby active stars with relatively rapid rotation and large starspot structures offer the opportunity to compare interferometric, spectroscopic, and photometric imaging techniques. In this paper, we image a spotted star with three different methods for the first time. The giant primary star of the RS Canum Venaticorum binary σ Geminorum (σ Gem) was imaged for two epochs of interferometric, high-resolution spectroscopic, and photometric observations. The light curves from the reconstructions show good agreement with the observed light curves, supported by the longitudinally consistent spot features on the different maps. However, there is strong disagreement in the spot latitudes across the methods.