Nuclear kinematics in nearby AGN. I. An ALMA perspective on the Morphology and Kinematics of the molecular CO(2-1) emission. (arXiv:1905.00994v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Ramakrishnan_V/0/1/0/all/0/1">V. Ramakrishnan</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nagar_N/0/1/0/all/0/1">N. M. Nagar</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Finlez_C/0/1/0/all/0/1">C. Finlez</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Storchi_Bergmann_T/0/1/0/all/0/1">T. Storchi-Bergmann</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Slater_R/0/1/0/all/0/1">R. Slater</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schnorr_Muller_A/0/1/0/all/0/1">A. Schnorr-Müller</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Riffel_R/0/1/0/all/0/1">R. A. Riffel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Mundell_C/0/1/0/all/0/1">C. G. Mundell</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Robinson_A/0/1/0/all/0/1">A. Robinson</a>
We present the molecular gas morphology and kinematics of seven nearby
Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1
kinematics within the inner $sim30$” ($lesssim9$~kpc) reveals rotation
patterns that have been explored using the Bertola rotation model and a
modified version of the Kinemetry package. The latter algorithm reveals various
deviations from pure circular rotation in the inner kiloparsec of all seven
galaxies, including kinematic twists, decoupled and counter-rotating cores. A
comparison of the global molecular gas and stellar kinematics show overall
agreement in the position angle of the major axis and the systemic velocity,
but larger discrepancies in the disc inclination. The residual maps obtained
with both the methods shows the presence of non-circular motions in most of the
galaxies. Despite its importance, a detailed interpretation of the physics
responsible for non-circular motions will be discussed in a forthcoming work.
We present the molecular gas morphology and kinematics of seven nearby
Seyfert galaxies obtained from our 230~GHz ALMA observations. The CO J=2-1
kinematics within the inner $sim30$” ($lesssim9$~kpc) reveals rotation
patterns that have been explored using the Bertola rotation model and a
modified version of the Kinemetry package. The latter algorithm reveals various
deviations from pure circular rotation in the inner kiloparsec of all seven
galaxies, including kinematic twists, decoupled and counter-rotating cores. A
comparison of the global molecular gas and stellar kinematics show overall
agreement in the position angle of the major axis and the systemic velocity,
but larger discrepancies in the disc inclination. The residual maps obtained
with both the methods shows the presence of non-circular motions in most of the
galaxies. Despite its importance, a detailed interpretation of the physics
responsible for non-circular motions will be discussed in a forthcoming work.
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