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Polarization VLBI Observations of a Complete Sample of Northern BL Lacertae Objects

Published online by Cambridge University Press:  12 April 2016

A. B. Pushkarev  and
D. C. Gabuzda
A. B. Pushkarev
Affiliation:
Sternberg Astronomical Institute, 119899 Moscow, Russia
D. C. Gabuzda
Affiliation:
Astro Space Center, Lebedev Physical Institute, 117924 Moscow, Russia

Abstract

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The polarization electric vectors in the VLBI jets of BL Lacertae objects are typically aligned with the jet structure. If the jet radio emission is optically thin synchrotron emission, this implies that the magnetic field is perpendicular to the jet, usually interpreted as a signature of shocks. The distribution of polarization position angles in the VLBI core components appears to be bimodal, with the polarization angles either aligned with or perpendicular to the jet direction. In order to study the origin of this characteristic polarization structure, we have made VLBI polarization observations of all 34 sources in the Kühr and Schmidt sample of BL Lacertae objects.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 165 - 166
Copyright
Copyright © Astronomical Society of the Pacific 1998

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