Colliding winds in ultraluminous X-ray sources

L. ABAROA; G.E. ROMERO; P. SOTOMAYOR CHECA

Buenos Aires

Congreso; Reunion Anual de la Asociación Argentina de Astronomía; 2021

Ultraluminous X-ray sources (ULX) are objects with luminosities that exceed the Eddington limitfor a stellar-mass black hole. In these closed binary systems, the star overflows its Roche lobe and the black holeaccretes matter at a supercritical rate. The upper layers of the disk are no longer in equilibrium and are ejectedas a powerful radiation-driven wind that interacts with the wind from the star producing shocks where particlescan be accelerated up to relativistic energies and then cool down yielding a broadband spectrum