A change in the optical polarization associated with a gamma-ray flare in the blazar 3C 279 - Astrophysics > Cosmology and Nongalactic AstrophysicsReport as inadecuate




A change in the optical polarization associated with a gamma-ray flare in the blazar 3C 279 - Astrophysics > Cosmology and Nongalactic Astrophysics - Download this document for free, or read online. Document in PDF available to download.

Abstract: It is widely accepted that strong and variable radiation detected over allaccessible energy bands in a number of active galaxies arises from arelativistic, Doppler-boosted jet pointing close to our line of sight. The sizeof the emitting zone and the location of this region relative to the centralsupermassive black hole are, however, poorly known, with estimates ranging fromlight-hours to a light-year or more. Here we report the coincidence of agamma-ray flare with a dramatic change of optical polarization angle. Thisprovides evidence for co-spatiality of optical and gamma-ray emission regionsand indicates a highly ordered jet magnetic field. The results also require anon-axisymmetric structure of the emission zone, implying a curved trajectoryfor the emitting material within the jet, with the dissipation region locatedat a considerable distance from the black hole, at about 10^5 gravitationalradii.



Author: The Fermi-LAT Collaboration, members of the 3C 279 multi-band campaign

Source: https://arxiv.org/







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