Abstract

This paper is a continuation of our work. The proper motions and radial velocities of stars from the Gaia DR2 with RV catalogue have been decomposed. We have confirmed that the Ogorodnikov-Milne model is consistent with the observational data and found the kinematic components that are not described by this model. The beyond-the-model harmonics have been partially identified with the nonlinear terms of the extended Oort model and the parameters of the second-order kinematic model.

中文翻译：

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使用标量和矢量球谐函数研究具有径向速度目录的Gaia数据版本2的恒星运动学

摘要

本文是我们工作的延续。Gaia DR2带有RV目录的恒星的适当运动和径向速度已经分解。我们已经确认Ogorodnikov-Milne模型与观测数据一致，并且发现了该模型未描述的运动学分量。模型外谐波已通过扩展的奥尔特模型的非线性项和二阶运动学模型的参数进行了部分识别。