论文标题
重新讨论黯然失色的二进制文件。论文II。偏心太阳能系统KX Cancri
Rediscussion of eclipsing binaries. Paper II. The eccentric solar-type system KX Cancri
论文作者
论文摘要
KX Cancri是一种黯然失色的二进制文件，其中包含两个G型星，轨道周期为31.2 d，偏心率为0.47。这些品质使其成为基准太阳能型二元系统的有前途的候选人。我们分析了该系统的第一条光曲线，以完全覆盖了使用过境系外行星调查卫星（TESS）获得的原发性和次要日食。我们以已发表的径向速度增强这些数据，并测量质量为1.134 +/- 0.003 MSUN和1.124 +/- 0.005 MSUN，RADII为1.053 +/- 0.006 RSUN和1.059 +//- 0.005 RSUN。与现有的基于地面的光曲线相反，苔丝数据强烈首选统一的半径之比。从恒星的半径和TEFF值测量的系统的距离与Gaia卫星的三角差线非常吻合。系统的特性与超极性金属性的理论预测一致，年龄为1.0至1.5 GYR。鼓励对基于高分辨率光谱的恒星的光球特性进行详细分析。
KX Cancri is an eclipsing binary containing two G-type stars with an orbital period of 31.2 d and an eccentricity of 0.47. These qualities make it a promising candidate for a benchmark solar-type binary system. We analyse the first light curve of this system to have complete coverage of both primary and secondary eclipses, obtained using the Transiting Exoplanet Survey Satellite (TESS). We augment these data with published radial velocities and measure the masses to be 1.134 +/- 0.003 Msun and 1.124 +/- 0.005 Msun and the radii to be 1.053 +/- 0.006 Rsun and 1.059 +/- 0.005 Rsun. A ratio of the radii near unity is strongly preferred by the TESS data, in contrast to existing ground-based light curves. The distance to the system measured from the radii and Teff values of the stars agrees well with the trigonometric parallax from the Gaia satellite. The properties of the system are consistent with theoretical predictions for a super-solar metallicity and an age of 1.0 to 1.5 Gyr. A detailed analysis of the photospheric properties of the stars based on high-resolution spectra is encouraged.
