Colloq Abstract - Beaklini
November 6, 2019
2:00pm Mountain
Pedro Beaklini (Univ. of Sao Paulo)
Monitoring blazar variability at radio wavelengths using Brazilian facilities
Abstract
Blazars are high luminosity AGNs presenting relativistic jets seen at small angles to the line of sight. They are also characterized by variability across the entire electromagnetic spectrum, and the emission is boosted due to relativistic effects. In this talk, I will present observations carried out at 43 GHz (7 mm) for the blazars 3C 273, 3C 279 and PKS 1510-089 using the Pierre Kaufmann Radio Observatory (former Itapetinga, Atibaia, Brazil). I will report on the variability monitoring results of theses sources and how they correlate with other wavelengths. Delays between high energy emission, either gamma-rays or optical R band, with respect to the 7-mm light curve have been detected. Although such delays present different observational signatures for each source, they are well explained by the shock-in-jet model. A high frequency follow up monitoring program of blazar sources using the LLAMA (Large Latin America Millimeter Array) Observatory is being planned. LLAMA is a joint initiative between Brazil and Argentina. In this presentation, I will also summarize the current status of the LLAMA and Pierre Kaufmann observatories.
