A new gravitational theory and dark matter problem  

作　　者：Xiong Zhao Yongge Ma 

机构地区：[1]Department of Physics,Beijing Normal University,Beijing 100875,China

出　　处：《Communications in Theoretical Physics》2024年第6期129-136,共8页理论物理通讯（英文版）

基　　金：supported by the National Science Foundation of China with Grant No.12275022.

摘　　要：We propose a new gravitational theory with torsion based on Riemann-Cartan geometry,in which all physical quantities are dynamical.In addition to the spacetime metric,the gravitational degrees of freedom in this theory also include the torsion and two scalar fields.The energy-momentum tensor of the matter fields in this theory is also proposed.A spherically symmetric static vacuum solution of the theory is obtained.It turns out that this solution can fit the observational data of the rotation curve outside the stellar disk in the Milky Way.Therefore,the galactic dark matter may just be the gravitational effect of the theory with torsion.

关 键 词：GRAVITY TORSION dark matter 

分 类 号：P145.9[天文地球—天体物理]