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

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arxiv 2305.06713 v1 pith:7XXIR4NB submitted 2023-05-11 astro-ph.GA astro-ph.HE

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

classification astro-ph.GA astro-ph.HE
keywords opticalvlbigalaxyhostshapeagnscleardirection
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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