Articulo
Evolutionary trajectories of ultracompact "black widow" pulsars with very low mass companions
Autor
Benvenuto, Omar Gustavo
De Vito, María Alejandra
Horvath, J.E.
Institución
Resumen
The existence of millisecond pulsars with planet-mass companions in close orbits is challenging from the stellar evolution point of view. We calculate in detail the evolution of binary systems self-consistently, including mass transfer, evaporation, and irradiation of the donor by X-ray feedback, demonstrating the existence of a new evolutionary path leading to short periods and compact donors as required by the observations of PSR J1719-1438. We also point out the alternative of an exotic nature of the companion planet-mass star. Facultad de Ciencias Astronómicas y Geofísicas