18 November 2026: Gloria Raharimbolamena

Speaker: Gloria Raharimbolamena (University of Bristol)

Date: Wednesday 18 November 2026

Time: 14:00

Location: Physics 3.21 (Berry)

Jet physics in FSRQs: from broadband spectra to radio variability

Blazars can emit energy at an enormous rate, covering the entire electromagnetic spectrum. Flat spectrum radio quasars (FSRQs), one of the blazar's major subgroup, are known to host powerful jets, which can be detected even at high energy. Their broadband spectral energy distribution (SED) is dominated by non-thermal processes in the jets. Synchrotron radiation governs the low energy emission, whereas inverse Compton scattering is believed to dominate the high energy emission. In the most powerful FSRQs, the thermal emission by the accretion disc is not completely hidden by the synchrotron component and is represented by a third bump seen in the SED. Accordingly, investigating their broadband SED provides a comprehensive view of the underlying mechanisms responsible for their diverse behaviours, including their jet and disc properties. In this talk, I will present two main research projects. The first part will mainly focus on the multiwavelength study of SWIFT J0909.0+0358 (z=3.29), one of the brightest sources at high redshift in the Swift-BAT catalog. In the second part, I will present a Fourier-domain analysis and variability study of the well-known FSRQ 3C 273 (z=0.158) across the radio spectrum.