报告题目：First test of General Relativity at the second Post-Newtonian order

报 告 人：Prof. Mauri Valtonen 
　　　　　　 Professor at the University of Turku and Director of Tuorla Observatory, Finland

摘　  要：We will discuss the case of the binary black hole system OJ287 which has the major axis precession rate of 39 degrees per period, about four orders of magnitude greater than the precession in binary pulsars. Therefore we may test General Relativity to the second Post Newtonian order for the first time. In the OJ287 system we determine the spin of the primary black hole as well as its mass. In General Relativity these uniquely determine the quadrupole moment. In the OJ287 system the quadrupole moment can be measured, and one may then perform a test of the so called no-hair theorem. The test parameter q=1 in General Relativity: our determination is q=1+/-0.3. The test may improve to the level of +/-10% in this decade if certain crucial measurements are carried out.

时　  间：2011年9月21日（星期三）上午10：00

地　  点：苏富特 一楼 会议室

欢迎您/你的参加！

　　　　　　　　　　　　　　　　　　　　　　 南京大学天文与空间科学学院