Speaker
Prof.
Jorge Horvath
(IAG-USP)
Description
Relativistic binary systems showing the ablation of the donor star by
pulsar winds have been discovered in 1988 and studied recently using
FermiLat and other facilities. We discuss in this presentation the
evolution of the "black widow" systems, showing that theoretical
tracks reveal i) the importance of illumination feedback of X rays
onto the donor star, ii) a long (several Gyr) overall timescale to arrive to the
observed orbital period-donor mass plane iii) their parenthood with
the younger "redback" binary systems; and iv) the large mass transfer
occurred along the evolution, which justifies the recent claims
of very large masses ($> 2 M_{\odot}$) of the neutron stars as measured
in at least three cases. We show how these features impact the
supranuclear equation of state and limit compositional possibilities.
Author
Prof.
Jorge Horvath
(IAG-USP)
