Search for rapid radio variability in a sample of gamma-ray emitting blazars with the radio telescopes of IAR

C.A. GALANTE; G.E. ROMERO; G.A. GANCIO

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

Blazars – active galactic nuclei in which one of the jets is pointing toward the observer – showflux density variations throughout the entire electromagnetic spectrum on time scales ranging from minutes toyears. The occurrence of gamma-ray emission in these objects indicates the presence of populations of relativisticparticles. Such particles should also emit in radio frequencies by synchrotron mechanism. The investigation ofmicrovariability at radio-wavelengths can provide information about the non-thermal processes that occur insidethe relativistic jets. We present results of 1.4-GHz variability observations of a sample of blazars, selected becauseof their strong gamma-ray emission. The observational campaign was carried out in February, 2021, using theupgraded Esteban Bajaja radio telescope of the Instituto Argentino de Radioastronom´ıa.