Magnetic field studies in BL lacertae through faraday rotation and a novel astrometric technique

Sol N. Molina, José L. Gómez, Richard Dodson, María J. Rioja

Research output: Contribution to journalArticle

Abstract

It is thought that dynamically important helical magnetic fields twisted by the differential rotation of the black hole's accretion disk or ergosphere play an important role in the launching, acceleration, and collimation of active galactic nuclei (AGN) jets. We present multi-frequency astrometric and polarimetric Very Long Baseline Array (VLBA) images at 15, 22, and 43 GHz, as well as Faraday rotation analyses of the jet in BL Lacertae as part of a sample of AGN jets aimed to probe the magnetic field structure at the innermost scales to test jet formation models. The novel astrometric technique applied allows us to obtain the absolute position at mm wavelengths without any external calibrator.

LanguageEnglish
Article number97
JournalGalaxies
Volume5
Issue number4
DOIs
StatePublished - 12 Dec 2017

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Faraday effect
magnetic fields
active galactic nuclei
Very Long Baseline Array (VLBA)
launching
collimation
accretion disks
probes
wavelengths

Cite this

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abstract = "It is thought that dynamically important helical magnetic fields twisted by the differential rotation of the black hole's accretion disk or ergosphere play an important role in the launching, acceleration, and collimation of active galactic nuclei (AGN) jets. We present multi-frequency astrometric and polarimetric Very Long Baseline Array (VLBA) images at 15, 22, and 43 GHz, as well as Faraday rotation analyses of the jet in BL Lacertae as part of a sample of AGN jets aimed to probe the magnetic field structure at the innermost scales to test jet formation models. The novel astrometric technique applied allows us to obtain the absolute position at mm wavelengths without any external calibrator.",
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Magnetic field studies in BL lacertae through faraday rotation and a novel astrometric technique. / Molina, Sol N.; Gómez, José L.; Dodson, Richard; Rioja, María J.

In: Galaxies, Vol. 5, No. 4, 97, 12.12.2017.

Research output: Contribution to journalArticle

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T1 - Magnetic field studies in BL lacertae through faraday rotation and a novel astrometric technique

AU - Molina,Sol N.

AU - Gómez,José L.

AU - Dodson,Richard

AU - Rioja,María J.

PY - 2017/12/12

Y1 - 2017/12/12

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KW - Astrometry

KW - Galaxies: active

KW - Galaxies: individual (BL Lacertae)

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KW - Polarization

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