Title: Thick disk kinematics from RAVE and the solar motion Show Chinese title

Title: 厚盘运动学来自RAVE和太阳运动

Abstract: Radial velocity surveys such as the Radial Velocity Experiment (RAVE) provide us with measurements of hundreds of thousands of nearby stars most of which belong to the Galactic thin, thick disk or halo. Ideally, to study the Galactic disks (both thin and thick) one should make use of the multi-dimensional phase-space and the whole pattern of chemical abundances of their stellar populations. In this paper, with the aid of the RAVE Survey, we study the thin and thick disks of the Milky Way, focusing on the latter. We present a technique to disentangle the stellar content of the two disks based on the kinematics and other stellar parameters such as the surface gravity of the stars. Using the Padova Galaxy Model, we checked the ability of our method to correctly isolate the thick disk component from the Galaxy mixture of stellar populations. We introduce selection criteria in order to clean the observed radial velocities from the Galactic differential rotation and to take into account the partial sky coverage of RAVE. We developed a numerical technique to statistically disentangle thin and thick disks from their mixture. We deduce the components of the solar motion relative to the Local Standard of Rest (LSR) in the radial and vertical direction, the rotational lag of the thick disk component relative to the LSR, and the square root of the absolute value of the velocity dispersion tensor for the thick disk alone. The analysis of the thin disk is presented in another paper. We find good agreement with previous independent parameter determinations. In our analysis we used photometrically determined distances. In the Appendix we show that similar values can be found for the thick disk alone as derived in the main sections of our paper even without the knowledge of photometric distances. Show Chinese abstract

Abstract: 径向速度调查如径向速度实验（RAVE）为我们提供了对数以十万计的附近恒星的测量数据，其中大部分属于银河系的薄盘、厚盘或晕。 理想情况下，为了研究银河系的盘（包括薄盘和厚盘），应利用多维相空间以及其恒星种群的化学丰度整体模式。 在本文中，借助RAVE调查，我们研究了银河系的薄盘和厚盘，重点研究后者。 我们提出了一种技术，基于恒星的动力学和其他恒星参数（如恒星的表面重力）来区分两个盘的恒星成分。 使用帕多瓦银河模型，我们检查了我们的方法正确地从银河系恒星种群混合物中分离出厚盘成分的能力。 我们引入了选择标准，以清理观测到的径向速度中的银河系差分旋转，并考虑RAVE的部分天空覆盖范围。 我们开发了一种数值技术，以统计方式从它们的混合物中分离薄盘和厚盘。 我们推导了相对于本地标准静止系（LSR）的太阳运动在径向和垂直方向的分量，厚盘成分相对于LSR的旋转滞后，以及仅厚盘的速度弥散张量绝对值的平方根。 薄盘的分析将在另一篇论文中呈现。 我们发现与以前独立的参数确定有良好的一致性。 在我们的分析中，我们使用了光度测定的距离。 在附录中，我们展示了即使不掌握光度距离，也可以在厚盘单独的情况下得到与我们论文主体部分得出的相似值。