双星β天琴座的一次分辨图像
First Resolved Images of the Eclipsing and Interacting Binary Beta Lyrae
摘要：
我们提出的第一个解决的图像的食二天琴座β，获得CHARA阵列干涉仪和MIRC组合器在H波段。图像清晰地显示了在所有六个观测时期的质量供体和质量获得者周围的厚盘。供体是更明亮的，一般出现在图像中拉长，第一次直接检测到光球潮汐变形由于罗氏瓣填充。我们还证实了预期的磁盘组件是更细长的捐助者，是在这个波长相对较暗。每一个历元的图像分析和模型拟合被用于计算天琴座β的第一个天体测量轨道解，得出轨道倾角和位置角的精确值。导出的半主轴也允许我们估计天琴座β的距离;然而，模型和图像之间的系统差异将我们距离估计的准确性限制在约15%。为了解决这些问题，我们需要一个更加物理的、自洽的模型来解释所有的历元以及来自食光变曲线的多波长信息。
英文摘要：
We present the first resolved images of the eclipsing binary Beta Lyrae, obtained with the CHARA Array interferometer and the MIRC combiner in the H band. The images clearly show the mass donor and the thick disk surrounding the mass gainer at all six epochs of observation. The donor is brighter and generally appears elongated in the images, the first direct detection of photospheric tidal distortion due to Roche-lobe filling. We also confirm expectations that the disk component is more elongated than the donor and is relatively fainter at this wavelength. Image analysis and model fitting for each epoch were used for calculating the first astrometric orbital solution for Beta Lyrae, yielding precise values for the orbital inclination and position angle. The derived semi-ma jor axis also allows us to estimate the distance of Beta Lyrae; however, systematic differences between the models and the images limit the accuracy of our distance estimate to about 15%. To address these issues, we will need a more physical, self-consistent model to account for all epochs as well as the multi-wavelength information from the eclipsing light curves.
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