Abstract

We have solved the Ogorodnikov–Milne stellar-kinematics equations in the Galactic rectangular coordinate system based on the total velocities for a special sample of stars with radial velocities from the final Gaia Data Release 3 catalogue. We have found the region of applicability of the linear model and the regions that it describes poorly. We have constructed a second-order model that takes into account the peculiarities of stellar kinematics more accurately and showed its applicability for stars at distances up to 5 kpc.

中文翻译：

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基于盖亚 DR3 星表恒星自行和径向速度的非线性运动星系自转模型参数的确定

摘要

我们已经根据最终盖亚数据第 3 版目录中具有径向速度的特殊恒星样本的总速度，求解了银河系直角坐标系中的奥戈罗德尼科夫-米尔恩恒星运动学方程。我们已经发现了线性模型的适用范围以及它描述不佳的区域。我们构建了一个二阶模型，该模型更准确地考虑了恒星运动学的特性，并展示了其对于距离达 5 kpc 的恒星的适用性。