用CHARA阵列测量毕宿巨星的角直径
Angular Diameters of the Hyades Giants Measured with the CHARA Array
摘要：
我们利用CHARA阵列的干涉仪测量了毕宿五巨星的角直径：γ、δ ^1、θ ^1和θ ^1。这些恒星的边缘变暗角直径的误差都小于2%，结合额外的可观测量，我们确定了这些恒星的有效温度，线性半径和绝对光度。此外，还可以从模型等时线推断恒星质量来确定表面重力。这些数据表明，一个新的校准的有效温度的误差远低于100 K，现在是可能的恒星的干涉角直径。
英文摘要：
We present angular diameters of the Hyades giants, gamma, delta^1, epsilon, and theta^1 Tau from interferometric measurements with the CHARA Array. Our errors in the limb-darkened angular diameters for these stars are all less than 2%, and in combination with additional observable quantities, we determine the effective temperatures, linear radii and absolute luminosities for each of these stars. Additionally, stellar masses are inferred from model isochrones to determine the surface gravities. These data show that a new calibration of effective temperatures with errors well under 100K is now possible from interferometric angular diameters of stars.
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