On Torsion-free Vacuum Solutions of the Model of de Sitter Gauge Theory   of Gravity
  It is shown that all vacuum solutions of Einstein field equation with a positive cosmological constant are the solutions of a model of dS gauge theory of gravity. Therefore, the model is expected to pass the observational tests on the scale of solar system and explain the indirect evidence of gravitational wave from the binary pulsars PSR1913+16. 
Chao-Guang Huang, Yu Tian, Xiaoning Wu, and Han-Ying Guo