Evolution of the rotational axis and orbital parameters of a star in a binary system due to quasi-stationary tides

P.B. Ivanov

Astro Space Center, P.N. Lebedev Physical Institute, 4/32 Profsoyuznaya Street, Moscow, 117810, Russia

We are going to consider the evolution of a binary system interacting due to tidal effects without restriction on the orientation of the orbital and stellar spin angular momenta, and orbital eccentricity, obtaining a set of equations governing the evolution of the orbit and rotational axis resulting from tidal effects. They can be used to determine the evolution of systems with initial significant misalignment of spin and orbital angular momenta as hypothesized for systems containing Hot Jupiters and compact objects. The inclusion of the Coriolis force in our analysis leads to evolution of the inclination between orbital and spin angular momenta and precession of the orbital plane on a short timescale, which may have observational consequences.

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