论文标题
四个明亮的黯然失色的二进制文件，用伽马朵拉德斯脉动组件：CM LAC，MZ LAC，RX DRA和V2077 CYG
Four bright eclipsing binaries with gamma Doradus pulsating components: CM Lac, MZ Lac, RX Dra and V2077 Cyg
论文作者
论文摘要
对脱毛二进制的脉动恒星的研究具有结合两种测量恒星物理特性的两种不同方法，以改善对恒星理论的约束。重力（g）模式脉动，例如$γ$ doradus恒星中发现的脉动，可用于探测旋转轮廓，混合和磁场。直到最近，众所周知的是$γ$ doradus的doradus恒星。我们已经从通过过渡系外行星调查卫星（TESS）获得的光曲线（苔丝）获得的四个独立的黯然失色二元系统中发现了G模式脉动，并对它们的蚀和脉动特征进行了分析。我们在CM LAC中发现频率1--1.5 d $^{ - 1} $的未解决的G模式脉动，并测量苔丝数据中的组件恒星的质量和半径，并发表了径向速度。 MZ LAC显示出更丰富的频谱，包括压力模式和潮汐激发的G模型。 RX DRA位于苔丝的北部连续观看区域，因此覆盖了整整一年的光曲线，但脉动频率相对较少。对于V2077 CYG，我们正式测量了四个脉动频率，但是可用的数据不足以正确解决G模式脉动。 V2077 CYG还显示了总的日食，我们可以获得对微弱次级恒星表面重力的首次测量。这四个系统都是详细研究的明亮和良好的候选者。安排了所有四个系统的进一步苔丝观察结果，在RX DRA和V2077 CYG的情况下，颞基础大大改善。
The study of pulsating stars in eclipsing binaries holds the promise of combining two different ways of measuring the physical properties of a star to obtain improved constraints on stellar theory. Gravity (g) mode pulsations such as those found in $γ$ Doradus stars can be used to probe rotational profiles, mixing and magnetic fields. Until recently few $γ$ Doradus stars in eclipsing binaries were known. We have discovered g-mode pulsations in four detached eclipsing binary systems from light curves obtained by the Transiting Exoplanet Survey Satellite (TESS) and present an analysis of their eclipses and pulsational characteristics. We find unresolved g-mode pulsations at frequencies 1--1.5 d$^{-1}$ in CM Lac, and measure the masses and radii of the component stars from the TESS data and published radial velocities. MZ Lac shows a much richer frequency spectrum, including pressure modes and tidally-excited g-modes. RX Dra is in the northern continuous viewing zone of TESS so has a light curve covering a full year, but shows relatively few pulsation frequencies. For V2077 Cyg we formally measure four pulsation frequencies, but the available data are inadequate to properly resolve the g-mode pulsations. V2077 Cyg also shows total eclipses, with which we obtain the first measurement of the surface gravity of the faint secondary star. All four systems are bright and good candidates for detailed study. Further TESS observations are scheduled for all four systems, with much improved temporal baselines in the cases of RX Dra and V2077 Cyg.
