Uncovering the planets and stellar activity of CoRoT-7 using only radial   velocities
  Stellar activity can induce signals in the radial velocities of stars, complicating the detection of orbiting low-mass planets. We present a method to determine the number of planetary signals present in radial-velocity datasets of active stars, using only radial-velocity observations. Instead of considering separate fits with different number of planets, we use a birth-death Markov chain Monte Carlo algorithm to infer the posterior distribution for the number of planets in a single run. In a natural way, the marginal distributions for the orbital parameters of all planets are also inferred. This method is applied to HARPS data of CoRoT-7. We confidently recover both CoRoT-7b and CoRoT-7c although the data show evidence for additional signals. 
J. P. Faria and R. D. Haywood and B. J. Brewer and P. Figueira and M.   Oshagh and A. Santerne and N. C. Santos
astro-ph.EP