论文标题
重新讨论黯然失色的二进制文件。纸VIII。双重划分的四颗星系统V498 Cygni
Rediscussion of eclipsing binaries. Paper VIII. The doubly-eclipsing quadruple star system V498 Cygni
论文作者
论文摘要
V498 CYG是一种早期的B型二元，已知在3.48 d的周期和两组光谱线上显示叶片。我们在1.44-D时期内发现了第二组蚀，从过渡系外行星调查卫星（TESS）的光曲线中。我们开发了一个光曲线模型，以同时拟合两种黯淡的二进制文件的性质，并将其应用于苔丝观测值。我们能够很好地拟合Fainter系统的光曲线，但是适合更明亮系统的光曲线无法再现其不对称的原发性日食或变化的光曲线形状。可用的日食时序测量非常分散，因此我们仅基于苔丝数据来确定轨道胚膜。我们推断所有四颗星的物理特性，估计较亮二元的组件的质量为10 msun和11 msun，而淡淡的二进制量为6.5 msun和3.5 msun。通过获得组件恒星的径向速度测量值，可以在将来可靠地确定系统的性能。
V498 Cyg is an early-B-type binary known to show eclipses on a period of 3.48 d, and two sets of spectral lines. We present the discovery of a second set of eclipses, on a 1.44-d period, in the light curve of this object from the Transiting Exoplanet Survey Satellite (TESS). We develop a model of the light curve to simultaneously fit the properties of both eclipsing binaries and apply this to the TESS observations. We are able to fit the light curve of the fainter system well, but the light curve fit for the brighter system is unable to reproduce either its asymmetric primary eclipse or its changing light curve shape. The available eclipse timing measurements are extremely scattered so we determine orbital ephemerides based only on the TESS data. We infer the physical properties of all four stars, estimating the masses of the components of the brighter binary to be 10 Msun and 11 Msun, and of the fainter binary to be 6.5 Msun and 3.5 Msun. The properties of the system may be reliably determined in future by obtaining radial velocity measurements of the component stars.
