Equilibrium and stability of relativistic stars in extended theories of   gravity
  We study static, spherically symmetric equilibrium configurations in extended theories of gravity (ETG) following the notation introduced by Capozziello et {\it al}. We calculate the differential equations for the stellar structure in such theories in a very generic form i.e., the Tolman-Oppenheimer-Volkoff generalization for any ETG is introduced. Stability analysis is also investigated with special focus on the particular example of scalar-tensor gravity. 
Aneta Wojnar and Hermano Velten
gr-qc astro-ph.CO hep-th