Exploring the magnetic field configuration in BL Lac using GMVA

Bindu Rani; Thomas Krichbaum; Jeff A. Hodgson; Shoko Koyama; Anton J. Zensus; Lars Fuhramnn; Alan Marscher; Svetlana Jorstad

doi:10.3390/galaxies4030032

Exploring the magnetic field configuration in BL Lac using GMVA

Bindu Rani, Thomas Krichbaum, Jeff A. Hodgson, Shoko Koyama, Anton J. Zensus, Lars Fuhramnn, Alan Marscher, Svetlana Jorstad

Department of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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 (mas) at 86 GHz, one could resolve scales up to ~450 gravitational radii (for a 10⁹ 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.

Original language	English
Article number	32
Journal	Galaxies
Volume	4
Issue number	3
DOIs	https://doi.org/10.3390/galaxies4030032
State	Published - 1 Sep 2016

Bibliographical note

Publisher Copyright:
© 2016 by the authors.

Keywords

Active galaxies
BL Lacertae object: BL Lac
GMVA
High-resolution VLBI
Jets
Magnetic field
Polarization

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title = "Exploring the magnetic field configuration in BL Lac using GMVA",

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 (mas) at 86 GHz, one could resolve scales up to ~450 gravitational radii (for a 109 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.",

keywords = "Active galaxies, BL Lacertae object: BL Lac, GMVA, High-resolution VLBI, Jets, Magnetic field, Polarization",

author = "Bindu Rani and Thomas Krichbaum and Hodgson, {Jeff A.} and Shoko Koyama and Zensus, {Anton J.} and Lars Fuhramnn and Alan Marscher and Svetlana Jorstad",

note = "Publisher Copyright: {\textcopyright} 2016 by the authors.",

year = "2016",

month = sep,

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doi = "10.3390/galaxies4030032",

language = "English",

volume = "4",

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T1 - Exploring the magnetic field configuration in BL Lac using GMVA

AU - Rani, Bindu

AU - Krichbaum, Thomas

AU - Hodgson, Jeff A.

AU - Koyama, Shoko

AU - Zensus, Anton J.

AU - Fuhramnn, Lars

AU - Marscher, Alan

AU - Jorstad, Svetlana

PY - 2016/9/1

Y1 - 2016/9/1

N2 - 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 (mas) at 86 GHz, one could resolve scales up to ~450 gravitational radii (for a 109 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.

AB - 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 (mas) at 86 GHz, one could resolve scales up to ~450 gravitational radii (for a 109 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.

KW - Active galaxies

KW - BL Lacertae object: BL Lac

KW - GMVA

KW - High-resolution VLBI

KW - Jets

KW - Magnetic field

KW - Polarization

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U2 - 10.3390/galaxies4030032

DO - 10.3390/galaxies4030032

M3 - Article

AN - SCOPUS:85054199788

SN - 2075-4434

VL - 4

JO - Galaxies

JF - Galaxies

IS - 3

M1 - 32

ER -

Exploring the magnetic field configuration in BL Lac using GMVA

Abstract

Bibliographical note

Keywords

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