THE OUTBURST OF THE BLAZAR S5 0716+71 IN 2011 OCTOBER: SHOCK IN A HELICAL JET

We present the results of optical (R band) photometric and polarimetric monitoring and Very Long Baseline Array (VLBA) imaging of the blazar S5 0716+714 along with Fermi gamma -ray data during a multi-waveband outburst in 2011 October. We analyze total and polarized intensity images of the blazar ob...

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Bibliographic Details
Published in:The Astrophysical journal 2013-05, Vol.768 (1), p.1-9
Main Authors: Larionov, V M, Jorstad, S G, Marscher, A P, Morozova, D A, Blinov, D A, Hagen-Thorn, V A, Konstantinova, T S, Kopatskaya, E N, Larionova, L V, Larionova, E G, Troitsky, I S
Format: Article
Language:English
Subjects:
Arrays
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BL LACERTAE OBJECTS
Blazars
GALAXIES
GHZ RANGE
Helical
JETS
Linear polarization
Mathematical analysis
MONITORING
Outbursts
POLARIZATION
ROTATION
SHOCK WAVES
VECTORS
Wave propagation
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Summary:We present the results of optical (R band) photometric and polarimetric monitoring and Very Long Baseline Array (VLBA) imaging of the blazar S5 0716+714 along with Fermi gamma -ray data during a multi-waveband outburst in 2011 October. We analyze total and polarized intensity images of the blazar obtained with the VLBA at 43 GHz during and after the outburst. Monotonic rotation of the linear polarization vector at a rate of [> ~]50[degrees] per night coincided with a sharp maximum in gamma -ray and optical flux. At the same time, within the uncertainties, a new superluminal knot appeared with an apparent speed of 21 + or - 2c. The general multi-frequency behavior of the outburst can be explained within the framework of a shock wave propagating along a helical path in the blazar's jet.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/768/1/40