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Galaxies 2016, 4(3), 32; doi:10.3390/galaxies4030032

Exploring the Magnetic Field Configuration in BL Lac Using GMVA

1
NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
2
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, Bonn 53121, Germany
3
Korea Astronomy and Space Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea
4
Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Emilio Elizalde
Received: 15 July 2016 / Revised: 9 September 2016 / Accepted: 13 September 2016 / Published: 20 September 2016
(This article belongs to the Special Issue Blazars through Sharp Multi-wavelength Eyes)
View Full-Text   |   Download PDF [1612 KB, uploaded 20 September 2016]   |  

Abstract

The high radio frequency polarization imaging of non-thermal emission from active galactic nuclei (AGN) is a direct way to probe the magnetic field strength and structure in the immediate vicinity of supermassive black holes (SMBHs) and is crucial in testing the jet-launching scenario. To explore the the magnetic field configuration at the base of jets in blazars, we took advantage of the full polarization capabilities of the Global Millimeter VLBI Array (GMVA). With an angular resolution of ∼50 micro-arcseconds (μas) at 86 GHz, one could resolve scales up to ∼450 gravitational radii (for a 10 9 solar mass black hole at a redshift of 0.1). We present here the preliminary results of our study on the blazar BL Lac. Our results suggest that on sub-mas scales the core and the central jet of BL Lac are significantly polarized with two distinct regions of polarized intensity. We also noted a great morphological similarity between the 7 mm/3 mm VLBI images at very similar angular resolution. View Full-Text
Keywords: active galaxies; BL Lacertae object: BL Lac; jets; GMVA; high-resolution VLBI; magnetic field; polarization active galaxies; BL Lacertae object: BL Lac; jets; GMVA; high-resolution VLBI; magnetic field; polarization
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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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MDPI and ACS Style

Rani, B.; Krichbaum, T.; Hodgson, J.A.; Koyama, S.; Zensus, A.J.; Fuhramnn, L.; Marscher, A.; Jorstad, S. Exploring the Magnetic Field Configuration in BL Lac Using GMVA. Galaxies 2016, 4, 32.

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