Apr 12 – 17, 2021
Africa/Johannesburg timezone

Modelling blazar SEDs and spectral variability with time-dependent diffusive shock acceleration

Apr 13, 2021, 3:45 PM
Contributed AGN Exploring the Cosmos: AGN-1


Markus Boettcher (North-West University)


In recent work, we have developed a self consistent two-zone model of
time-dependent diffusive shock acceleration in the relativistic jets of
blazars and the resulting multi-wavelength spectral and variability
features. In this paper, we report the results of detailed fitting of
this model to recent multi-wavelength data from two blazars detected
during bright gamma-ray flares by Fermi-LAT and H.E.S.S.: the flat
spectrum radio quasars 3C 279 and PKS 1510-089. Simultaneous fits to
snap-shot SEDs and multi-wavelength light curves are presenbted. Well
sampled, continuous GeV gamma-ray light curves by Fermi-LAT are crucial
to tightly constrain the energy-dependent mean-free path to pitch-angle
scattering of relativistic electrons and its temporal change during the
passage of a mildly relativistic shock, along with changes of other
emission-region parameters. This allows deep insights into the nature
of hydromagnetic turbulence induced by the shock.

Primary author

Markus Boettcher (North-West University)

Presentation materials