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Galaxies 2016, 4(4), 44; doi:10.3390/galaxies4040044

Parsec-Scale Structure and Kinematics of Faint TeV HBLs

1
Department of Physics and Astronomy, Whittier College, Whittier, CA 90608, USA
2
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
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)
View Full-Text   |   Download PDF [806 KB, uploaded 11 October 2016]   |  

Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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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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