Effect of tides on the orbital evolution of irradiated interacting binaries

ECHEVESTE, M; NOVARINO, M L; BENVENUTO, O. G; DE VITO, M. A.

Viedma

Congreso; 61 Reunión Anual de la Asociación Argentina de Astronomía; 2020

Universidad Nacional de Río Negro e Instituto Argentino de Radioastronomía

We study the evolution of interacting binaries composed by a neutron star and an ordinary solar-likestar. We analyse the effect of tides on the evolution of the orbital elements, incorporating them in the binary evolution code developed by our group. Benvenuto, De Vito and Horvath have studied the evolution of these systems considering that the synchronisation and circularization of the orbit occur instantaneously. Besides, they included irradiation feedback and evaporation, which are phenomena that deeply affect the occurrence of mass transfer episodes. In their studies, they found a progenitor for the PSR J1723-2837 redback that can explain the observed orbital period, temperature and mass of the donor star, but it fails to fit the observed orbital period derivative. In this work we consider the effect of tides between mass transfer episodes in order to study the change in the orbital period of the system in detail.