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arXiv 0907.0817astro-ph.SR
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开普勒星震目标的光谱研究

A Spectroscopic Study of Kepler Asteroseismic Targets

J. Molenda-Zakowicz, A. Frasca, D. W. Latham, M. Jerzykiewicz

摘要:

报告的是在三个观测站对开普勒主要小行星地震目标的15个候选者和开普勒视野中的其他14颗恒星进行的分光观测(见脚注)。对于所有这些恒星,径向速度,有效温度,表面重力,金属丰度和投影旋转速度是通过两种独立的方法从两组独立的数据中得出的。此外,MK类型是从这些数据集之一估计的。HIP 94734,HIP 94743,HIP 94335,HIP 94734,HIP 94743,这三颗恒星的径向速度是可变的。对于HIP 94335 = FL Lyr,一个著名的Algol型食变星和一个双线分光双星,由我们的数据计算的轨道根数与Popper等人的结果非常一致.对于HIP 94734和HIP 94743 = V2077 Cyg,我们发现它们是单线系统,我们导出了轨道根数.此外,根据轨道周期和依巴谷历元测光结果,证明HIP 94743是一颗脱离食双星。

英文摘要:

Reported are spectroscopic observations of 15 candidates for Kepler primary asteroseismic targets and 14 other stars in the Kepler field, carried out at three observatories (see the footnote). For all these stars, the radial velocities, effective temperature, surface gravity, metallicity, and the projected rotational velocity are derived from two separate sets of data by means of two independent methods. In addition, MK type is estimated from one of these sets of data. Three stars, HIP 94335, HIP 94734, and HIP 94743, are found to have variable radial-velocity. For HIP 94335 = FL Lyr, a well-known Algol-type eclipsing variable and a double-lined spectroscopic binary, the orbital elements computed from our data agree closely with those of Popper et al. For HIP 94734 and HIP 94743 = V2077 Cyg, which we discover to be single-lined systems, orbital elements are derived. In addition, from our value of the orbital period and the Hipparcos epoch photometry, HIP 94743 is demonstrated to be a detached eclipsing binary.

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