A relativistic model for Strange Quark Star
  We propose a spherically symmetric and anisotropic model for strange quark stars within the framework of MIT Bag model. Though the model is found to comply with all the physical requirements of a realistic star satisfying a strange matter equation of state (EOS), the estimated values the Bag constant for different strange star candidates like Her X-1, SAX J 1808.4-3658 and 4U 1820-30, clearly indicate that the Bag constant need not necessarily lie within the range of 60-80 MeV fm$^{-3}$ as claimed in the literature. 
Mehedi Kalam, Anisul Ain Usmani, Farook Rahaman, Sk. Monowar Hossein,   Indrani Karar and Ranjan Sharma
gr-qc