A new method to test the cosmic distance duality relation using the strongly lensed gravitational waves  

作　　者：Hai-Nan Lin Xin Li 林海南;李昕(Department of Physics,Chongqing University,Chongqing 401331,China)

机构地区：[1]Department of Physics,Chongqing University,Chongqing 401331,China

出　　处：《Chinese Physics C》2020年第7期179-183,共5页中国物理C（英文版）

基　　金：Supported by the National Natural Science Fund of China(11603005 and 11775038)。

摘　　要：We propose a new method to test the cosmic distance duality relation using the strongly lensed gravitational waves.The simultaneous observation of the image positions,relative time delay between different images,redshift measurements of the lens and the source,together with the mass modelling of the lens galaxy,provide the angular diameter distance to the gravitational wave source.On the other hand,the luminosity distance to the source can be obtained from the observation of the gravitational wave signals.To our knowledge this is the first time a method is proposed to simultaneously measure the angular diameter distance and the luminosity distance from the same source.Hence,the strongly lensed gravitational waves provide a unique method to test the cosmic distance duality relation.With the construction of the third generation gravitational detectors such as the Einstein Telescope,it will be possible to test the cosmic distance duality relation with an accuracy of a few percent.

关 键 词：gravitational waves gravitational lensing COSMOLOGY 

分 类 号：P159[天文地球—天文学]