Mass Discrepancy-Acceleration Relation in Einstein Rings
Yong Tian1*, Chung-Ming Ko1,2
1Institute of Astronomy, National Central University, Taoyuan City, Taiwan
2Department of Physics and Center of Complex System, National Central Universit, Taoyuan City, Taiwan
* Presenter:Yong Tian,
The mass discrepancy between dynamical and baryonic mass is strongly related to gravitational acceleration in spiral and elliptical galaxies. It is called the mass discrepancy-acceleration relation (MDAR). It is interesting to explore the relation in relativistic phenomena like gravitational lensing. We studied 57 Einstein rings of elliptical galaxy lenses from Sloan Lens ACS Survey (SLACS). We found that the MDAR of the 57 Einstein rings agreed well with the result from dynamics but with less scattering.

Keywords: Dark Matter, Galaxies, Gravitational Lensing