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

doi:10.3390/galaxies5040097

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 journal › Article › peer-review

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.

Original language	English
Article number	97
Journal	Galaxies
Volume	5
Issue number	4
DOIs	https://doi.org/10.3390/galaxies5040097
Publication status	Published - 12 Dec 2017

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title = "Magnetic field studies in BL lacertae through faraday rotation and a novel astrometric technique",

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.",

keywords = "Astrometry, Galaxies: active, Galaxies: individual (BL Lacertae), Galaxies: jets, Polarization",

author = "Molina, {Sol N.} and G{\'o}mez, {Jos{\'e} L.} and Richard Dodson and Rioja, {Mar{\'i}a J.}",

year = "2017",

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doi = "10.3390/galaxies5040097",

language = "English",

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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

N2 - 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.

AB - 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.

KW - Astrometry

KW - Galaxies: active

KW - Galaxies: individual (BL Lacertae)

KW - Galaxies: jets

KW - Polarization

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U2 - 10.3390/galaxies5040097

DO - 10.3390/galaxies5040097

M3 - Article

AN - SCOPUS:85037723797

SN - 2075-4434

VL - 5

JO - Galaxies

JF - Galaxies

IS - 4

M1 - 97

ER -

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

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