Visual binary stars with known orbits in <i>Gaia</i> EDR3

Ten CORAVEL spectroscopic binary orbits of evolved stars

On the basis of Coravel observations, we present orbital parameters for 10 spectroscopic-binary systems including an evolved star, namely HD 13530, HD 28591, HD 47415, HD 78414, HD 123999, HD 153751, HD 174881, HD 179094, HD 212280 and HD 217188. The most significant result is related to HD 13530, for which we have found an orbital period of 1575.48±1.63 days and an eccentricity of 0.8815. Such...

Galactic orbits of stars with planets ⋆

We have reconstructed the galactic orbits of the parent stars of exo-planets. For comparison, we have recalculated the galactic orbits of stars from the Edvardsson et al. (1993) catalog. A comparison between the two samples indicates that stars with planets are not kinematically peculiar. At each perigalactic distance stars with planets have a metallicity systematically larger than the average ...

Relative orientation of orbits in triple stars

Statistical analysis of the relative alignment of inner and outer orbits in triple systems resulting from a dynamical decay of small-N clusters (N ≤ 10) is presented and compared to the statistics of real multiple stars. The distribution of the relative angle Φ between the angular momentum vectors of inner and outer orbits in triple stars formed by decay is shown to depend on the initial cluste...

Effect of Rogue Stars on the Orbits of Binary Star Systems

Impact of the nuclear equation of state on the last orbits of binary neutron stars

We present calculations of quasiequilibrium sequences of irrotational binary neutron stars based on realistic equations of state (EOS) for the whole neutron star interior. Three realistic nuclear EOSs of various softness and based on different microscopic models have been joined with a recent realistic EOS of the crust, giving in this way three different EOSs of neutron-star interior. Computati...