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Parsec-Scale Structure and Kinematics of Faint TeV HBLs

Department of Physics and Astronomy, Whittier College, Whittier, CA 90608, USA
CSIRO Astronomy and Space Science, Epping 2121, Australia
Author to whom correspondence should be addressed.
Academic Editors: Jose L. Gómez, Alan P. Marscher and Svetlana G. Jorstad
Galaxies 2016, 4(4), 44;
Received: 6 September 2016 / Revised: 29 September 2016 / Accepted: 30 September 2016 / Published: 11 October 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
We present new multi-epoch Very Long Baseline Array (VLBA) observations of a set of TeV blazars drawn from our VLBA program to monitor all TeV-detected high-frequency peaked BL Lac objects (HBLs) at parsec scales. Most of these sources are faint in the radio, so they have not been well observed with VLBI by other surveys. Our previous measurements of apparent jet speeds in TeV HBLs showed apparent jet speeds that were subluminal or barely superluminal, suggesting jets with velocity structures at the parsec-scale. Here we present apparent jet speed measurements for eight new TeV HBLs, which for the first time show a superluminal tail to the apparent speed distribution for the TeV HBLs. View Full-Text
Keywords: TeV blazars; VLBI; active galactic nuclei TeV blazars; VLBI; active galactic nuclei
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Piner, B.G.; Edwards, P.G. Parsec-Scale Structure and Kinematics of Faint TeV HBLs. Galaxies 2016, 4, 44.

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