论文标题
部分可观测时空混沌系统的无模型预测
Analysis of the Distance Scales by Cepheids from the Gaia EDR3 Catalogue Data
论文作者
论文摘要
我们研究了120岁以下的经典头孢虫样本的运动学。对于这些恒星，基于周期性关系关系的Skowron等人获得的距离的估计值以及远处的速度和盖亚目录中的适当运动。也有距离Gaia ERD3目录中包含的三角差异得出的距离估计值。一种方法依赖于比较银河旋转角速度的一阶导数，它表明需要延长由Skowron等人确定的距离尺度。大约10％。通过直接比较使用三角类似物预测的距离，证实了这一结论。考虑到这一结果，我们获得了银河旋转参数和螺旋密度波的参数的新估计。
We study the kinematics of a sample of classical Cepheids younger than 120 Myr. For these stars, the estimates of distances taken from Skowron et al., which are based on the period-luminosity relation, and the line-of-sight velocities and the proper motions from the Gaia catalog are available. There are also distance estimates derived from the trigonometric parallaxes contained in the Gaia ERD3 catalog. A method, which relies on comparison of the first-order derivative of the Galactic rotation angular velocity, showed the need to lengthen the distance scales determined by Skowron et al. by about 10%. This conclusion was confirmed by direct comparison to the distances predicted on using the trigonometric parallaxes. With taking into account this result, we obtained new estimates of the Galactic rotation parameters and the parameters of a spiral density wave.
