Monitoring the non-thermal Universe 2018

Session

Radio

Sep 20, 2018, 4:15 PM

Cochem (Mosel), Germany

Conveners

Radio: Radio 1

• Vasiliki Pavlidou (University of Crete)

50. AGN monitoring with very-long-baseline interferometry

Eduardo Ros (MPI für Radioastronomie & Univ. de València)

9/20/18, 4:15 PM

Oral

Active galactic nuclei (AGN) present rapid variability across the electromagnetic spectrum. In most cases, this can be explained with relativistic boosting along the line of sight. A very valuable approach to probe the nature of these objects is to study their radio morphology at the highest resolution available at present, provided by very-long-baseline interferometry (VLBI). While...

25. VLBI Jet Kinematics of the TeV Blazar Mrk 421

Sarah Wagner

9/20/18, 4:45 PM

Oral + Poster

In September 2012, the blazar Mrk421 showed a remarkable and distinct radio flare most prominent at cm wavelengths, following a similar flare at gamma-ray energies that occured about 40 days earlier. The radio flaring bahavior indicates the injection of fresh plasma into the jet, which may lead to the formation of a new jet component on parsec scales. This can be verified in analysis of the...

13. Delving Deeper into Blazar Cores with 3mm GMVA Polarimetric Observations

Carolina Casadio (Max-Planck-Institut für Radioastronomie)

9/20/18, 5:05 PM

Oral

In order to investigate the high energy emission and jet formation in blazars, we study a sample of gamma-ray bright AGN in a combined 7mm / 3mm Vlbi monitoring program. Here we present total and linearly polarized  GMVA images of a sample of blazars from the VLBA-BU-BLAZAR program, obtained from May 2016 to March 2017.  The lower opacity at 3 mm and high angular resolution, of the order of 50...

8. Constraining the limiting brightness temperature and Doppler factors for the largest sample of radio bright blazars

Ioannis Liodakis (KIPAC, Stanford University)

9/20/18, 5:25 PM

Oral

Relativistic effects dominate the emission of blazar jets complicating our understanding of their intrinsic properties. Although many methods have been proposed to account for them, the variability Doppler factor method has been shown to describe the blazar populations best. We use a Bayesian hierarchical code called Magnetron to model the light curves of 973 sources observed by the Owens...

34. Centimeter-Band Linear Polarization Variability as a Probe of Blazar Jet Physics

Dr Margo Aller (University of Michigan, USA)

Oral

Magnetic field strength and geometry are fundamental properties which control the formation and evolution of relativistic jets, and their observed emission via the field's impact on particle acceleration. At centimeter-band, where the emission is well-known to be produced by the synchrotron process, magnetic field properties can be constrained using a wealth of data from both single-dish...