Astrophysics and Space Science Astrophysics and Space Science, Springer Verlag, 2014, 354 (1), pp.229-246. ⟨10.1007/s10509-014-1942-7⟩ Astrophysics and Space Science, 2014, 354 (1), pp.229-246. ⟨10.1007/s10509-014-1942-7⟩ Astrophysics and Space Science, 354(1), 229-246