Conveners
Parallel 5: AGN II
- Marcos Santander (University of Alabama)
TXS 0506+056 is the first multimessenger blazar. We develop a one-zone, leptohadronic particle transport model and examine the multiwavelength SED simultaneous with each neutrino event. The model is specifically designed to examine the effects of particle acceleration on the observable data through self-consistent implementation of both acceleration and emission processes. We also compare with...
The discovery of a diffuse flux of astrophysical neutrinos opens up pressing questions about the nature of the astronomical objects producing it. The quest for the sources of the diffuse, high-energy neutrino signal led to the identification of the first compelling candidate, the blazar TXS 0506+056. Furthermore, the survey on 10 years of IceCube data revealed an excess at the 2.9$\sigma$...
The MAGIC collaboration has recently analyzed data from a long-term multiwavelength campaign of the $\gamma$-ray blazar TXS 0506+056. In December 2018, it was flaring in the very-high-energy (VHE; $E>100$ GeV) $\gamma$-ray band, but no simultaneous neutrino event was detected. We explore prospects for detecting $\gamma$-rays and neutrinos of hadronic origin, produced both inside and outside...
We apply the detailed black hole magnetosphere models of Nathanail & Contopoulos to model the polarization properties and neutrino emission from blazars. We show that the polarized emission properties (evolution of PA, correlation between degree of Polarization and flux is similar to that of pulsars, indicating a similar underlying geometry. The additional difference in blazars from pulsars is...
Blazars emit across all electromagnetic wavelengths. While the so-called one-zone model has described well both quiescent and flaring states, it cannot explain the radio emission and fails in more complex data sets, such as AP Librae. In order to self-consistently describe the entire electromagnetic spectrum emitted by the jet, extended radiation models are necessary. Notably, kinetic...
The broad-band multiwavelength spectral energy distribution of blazars consists of two components: the low-energy hump commonly interpreted as synchrotron emission of relativistic electrons accelerated in a parsec-scale magnetized jet and the high-energy component, the nature of which remains debatable, depending on the jet composition. Two main scenarios were developed to shed light on...
