This week's Lunch Talk will be given by Xing Zhang (张星), at 11:30AM Nov. 28 (Thursday) in the 19th-floor Observatory Hall (天文台报告厅).  He will present his work on the Gravitational Waves and Testing Gravity (引力波和引力检验).

报告摘要：引力波的发现为引力物理的检验提供了重要的手段。在本报告中，我将首先介绍利用脉冲双星引力辐射轨道衰减效应检验引力物理，然后着重介绍利用致密双星并合引力波检验引力物理，主要包括利用引力波检验等效原理、引力偶极辐射、引力波色散关系、引力洛伦兹对称性等问题。

You are welcome to join the discussion. We will provide boxed food from the faculty canteen. Please sign up via WeChat (Journal Club group) before Nov. 28th (Thur) 9 AM. The boxed food contains two meat dishes and two vegetable dishes by default, please add a * after your name if you want a vegetarian meal. Those who sign up but don't attend on time should pay a￥20 fee for the food, which will be used for future academic activities.