Cassini航天器II掩星的高角分辨率恒星成像：Kronocyclic层析成像
High Angular Resolution Stellar Imaging with Occultations from the Cassini Spacecraft II: Kronocyclic Tomography
摘要：
我们提出了一个进步，在使用卡西尼观测恒星掩星的土星环的恒星研究。Stewart等人（2013年）证明了这种观测在测量恒星角直径方面的潜在用途。在这里，我们使用这些相同的观察，和层析成像重建技术，以产生复杂的恒星系统的二维图像。详细介绍了基本观测参考系的确定。恢复模型独立的亮度轮廓的数据从每个掩星边缘的技术进行了讨论，随着这些配置文件的层析组合，以建立一个源星的图像。最后，我们用恢复的半人马座α双星系统和演化的晚型巨星Mira的星周环境的图像演示了该技术。
英文摘要：
We present an advance in the use of Cassini observations of stellar occultations by the rings of Saturn for stellar studies. Stewart et al. (2013) demonstrated the potential use of such observations for measuring stellar angular diameters. Here, we use these same observations, and tomographic imaging reconstruction techniques, to produce two dimensional images of complex stellar systems. We detail the determination of the basic observational reference frame. A technique for recovering model-independent brightness profiles for data from each occulting edge is discussed, along with the tomographic combination of these profiles to build an image of the source star. Finally we demonstrate the technique with recovered images of the α Centauri binary system and the circumstellar environment of the evolved late-type giant star, Mira.
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