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Exploring connections between the VLBI and optical morphology of AGNs and their host galaxies

Published online by Cambridge University Press:  11 September 2023

David Fernández Gil Open the ORCID record for David Fernández Gil [Opens in a new window] ,
Jeffrey A. Hodgson  and
Benjamin L’Huillier Open the ORCID record for Benjamin L’Huillier [Opens in a new window]
David Fernández Gil
Affiliation:
Sejong University, Dept. of Physics and Astronomy, Seoul, South Korea
Jeffrey A. Hodgson
Affiliation:
Sejong University, Dept. of Physics and Astronomy, Seoul, South Korea
Benjamin L’Huillier
Affiliation:
Sejong University, Dept. of Physics and Astronomy, Seoul, South Korea
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Abstract

We analyse VLBI and optical images of AGNs and their host galaxies and look for statistical correlations between the shape and orientation of the galaxy and the direction of the jet. We utilise the Astrogeo catalogue, which has over 9000 VLBI sources, many of those with a clear core-jet like structure that allows for the jet position angle to be reliably determined. We then use the VLBI source positions to search for optical counterparts within various optical surveys. In order to parameterise the orientation and shape of the host galaxy, we fitted a Gaussian elliptical model to the optical image, taking the PSF into account. We check our own shape parameters from this fit against the ones provided by the optical surveys. As of yet, no clear correlation between the galaxy morphology and the jet direction is seen.

Keywords

AGN jetsHost galaxiesOptical counterpartsVLBIAstrogeoSDSSJet directionGalaxy morphology
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 17 , Symposium S375: The Multimessenger Chakra of Blazar Jets , December 2021 , pp. 31 - 34
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Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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