论文标题
29 SDB+DM黯然失色二进制的物理特性
Physical Properties of 29 sdB+dM Eclipsing Binaries in Zwicky Transient Facility
论文作者
论文摘要
大规模时域调查的发展提供了研究物理特性以及B型细分（SDB）（SDB）和M型矮人（DM）的进化场景的机会。在这里，我们基于Zwicky瞬态设施（ZTF）光曲线和$ GAIA $早期数据版本3（EDR3）可视性获得了33个SDB+DM Eclipsing Binaries。通过使用Phoebe代码进行光曲线分析，我们获得了29 SDB+DM参数的概率分布。 $ r_1 $，$ r_2 $和$ i $是确定的，质量比$ q $的平均不确定性为0.08。如果假定典型的SDB质量，我们的参数与以前的工作非常吻合。根据29 SDB+DM的参数，我们发现质量比$ Q $和同伴的半径$ r_2 $随着轨道时期的缩短而减小。对于轨道周期小于0.075天的三个SDB+DM，他们的同伴都是棕色矮人。同伴的质量和半径满足低质量恒星和棕色矮人的质量 - 拉迪乌斯关系。 RADII的同伴在$ 0.12R_ \ odot $和$ 0.15R_ \ odot $之间似乎缺少了观测值。随着将来使用ZTF和$ GAIA $在将来发现和分类更多的短期SDB+DM黯然失色的二进制文件，我们将有更多信息来限制SDB+DM的进化结束。
The development of large-scale time-domain surveys provides an opportunity to study the physical properties as well as the evolutionary scenario of B-type subdwarfs (sdB) and M-type dwarfs (dM). Here, we obtained 33 sdB+dM eclipsing binaries based on the Zwicky Transient Facility (ZTF) light curves and $Gaia$ early data release 3 (EDR3) parallaxes. By using the PHOEBE code for light curve analysis, we obtain probability distributions for parameters of 29 sdB+dM. $R_1$, $R_2$, and $i$ are well determined, and the average uncertainty of mass ratio $q$ is 0.08. Our parameters are in good agreement with previous works if a typical mass of sdB is assumed. Based on parameters of 29 sdB+dM, we find that both the mass ratio $q$ and the companion's radius $R_2$ decrease with the shortening of the orbital period. For the three sdB+dMs with orbital periods less than 0.075 days, their companions are all brown dwarfs. The masses and radii of the companions satisfy the mass--radius relation for low-mass stars and brown dwarfs. Companions with radii between $0.12R_\odot$ and $0.15R_\odot$ seem to be missing in the observations. As more short-period sdB+dM eclipsing binaries are discovered and classified in the future with ZTF and $Gaia$, we will have more information to constrain the evolutionary ending of sdB+dM.
