Speaker
Description
Orphan flares are events where flaring takes place in one frequency
unaccompanied by flaring in other bands. Orphan flares are usually secondary flares. We study a very-high-energy orphan flare taking place in 3C279, an FSRQ-type blazar. A primary flare was observed 11 days earlier by Fermi-LAT. We study three models that could explain orphan flares. The hadronic synchrotron mirror model, interpreted as proton synchrotron radiation, constraining the parameters of the relativistic proton population in the jet. The ring-of-fire model, a relativistic plasma "blob" travels along the spine of a blazar jet and passes through a stationary, synchrotron-emitting ring of electrons. And a unified model also known as the stochastic dissipation model where if an orphan flare occurs is based on the distance of the blob from the super massive black hole. The results from the three models are compared.