Radio emission from ultraluminous X-ray sources

LEANDRO ABAROA

Buenos Aires

Workshop; Workshop on Prospects for Low Frequency Radio Astronomy in South America; 2022

Instituto Argentino de Radioastronomía

Ultraluminous X-ray sources are point-like, extra galactic non-nuclear objects, where the luminosity in the X-ray band appears to be higher than the Eddington luminosity. These objects are thought to be X-ray binaries accreting at super-Eddington rates, in which the \sim 10^40 erg/s power in the X-ray band is emitted from the innermost part of the accretion disk around the compact object. The disk ejects a powerful radiatively-driven wind that collides with the stellar wind, where strong shocks are generated. In this work we show that the collision of winds in these systems leads to nonthermal emission. The ULXs yields a broadband spectrum, with radio luminosities of the order of \approx 10^34 erg/s produced by the electron synchrotron radiation.