Accession Number:

ADA523212

Title:

Constraints on the Gamma-Ray Emitting Region in Blazars from Multi-Frequency VLBI Measurements

Descriptive Note:

Conference paper

Corporate Author:

MAX-PLANCK-INSTITUT FUER RADIOASTRONOMIE BONN (GERMANY)

Report Date:

2010-06-23

Pagination or Media Count:

5.0

Abstract:

Single-zone synchrotron self-Compton and external Compton models are widely used to explain broadband Spectral Energy Distributions SEDs of blazars from infrared to gamma-rays. These models bear obvious similarities to the homogeneous synchrotron cloud model which is often applied to explain radio emission from individual components of parsec-scale radio jets. The parsec-scale core, typically the brightest and most compact feature of blazar radio jet, could be the source of high-energy emission. We report on ongoing work to test this hypothesis by deriving the physical properties of parsec-scale radio emitting regions of twenty bright Fermi blazars using dedicated 5-43 GHz VLBA observations and comparing these parameters to results of SED modeling.

Subject Categories:

  • Optics
  • Particle Accelerators
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE