用CHARA干涉仪对H波段大陵五星系成像
Imaging the Algol Triple System in H Band with the CHARA Interferometer
摘要：
大陵五（Beta Per）是一个被广泛研究的等级三元系统，其内部双星是一个原型半分离双星，质量转移发生在次巨星次级到主序星之间。在这里，我们提出了我们的大陵五观测的结果在2006年和2010年之间在CHARA干涉仪与密歇根红外组合器在H波段。使用四个长基线望远镜使我们能够实现优于0.5质量的分辨率，并明确地解决三颗恒星。内部和外部的轨道要素，以及角的大小和质量比的三个组成部分独立于以前的研究。我们报告了一个显着改善轨道的内部恒星对的主要质量相比，以前的研究有15%的变化的后果。我们还确定了轨道的相互倾斜度比以前建立的更接近椭圆度。国家的最先进的图像重建算法用于成像的完整的三重系统。特别是一个图像序列的55个不同阶段的内对轨道重建，清楚地显示了罗什瓣填充的次要围绕主要的旋转，与几个时代对应的主要和次要的日食。
英文摘要：
Algol (Beta Per) is an extensively studied hierarchical triple system whose inner pair is a prototype semi-detached binary with mass transfer occurring from the sub-giant secondary to the main-sequence primary. We present here the results of our Algol observations made between 2006 and 2010 at the CHARA interferometer with the Michigan Infrared Combiner in the H band. The use of four telescopes with long baselines allows us to achieve better than 0.5 mas resolution and to unambiguously resolve the three stars. The inner and outer orbital elements, as well as the angular sizes and mass ratios for the three components are determined independently from previous studies. We report a significantly improved orbit for the inner stellar pair with the consequence of a 15% change in the primary mass compared to previous studies. We also determine the mutual inclination of the orbits to be much closer to perpendicularity than previously established. State-of-the-art image reconstruction algorithms are used to image the full triple system. In particular an image sequence of 55 distinct phases of the inner pair orbit is reconstructed, clearly showing the Roche-lobe-filling secondary revolving around the primary, with several epochs corresponding to the primary and secondary eclipses.
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