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Measuring bar pattern speeds from single simulation snapshots

Dehnen, Walter; Semczuk, Marcin; Schönrich, Ralph; (2023) Measuring bar pattern speeds from single simulation snapshots. Monthly Notices of the Royal Astronomical Society , 518 (2) pp. 2712-2718. 10.1093/mnras/stac3184. Green open access

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Abstract

We describe methods to measure simultaneously the orientation angle ψ and pattern speed Ω=dψ/dt from single snapshots of simulated barred galaxies. Unlike previous attempts, which suffer from systematic errors of 5-25%, our approach is unbiased. It can be extended to obtain the rate and axis of rotation, i.e. the vector Ω⁠. We provide computer code implementing our method.

Type: Article
Title: Measuring bar pattern speeds from single simulation snapshots
Open access status: An open access version is available from UCL Discovery
DOI: 10.1093/mnras/stac3184
Publisher version: https://doi.org/10.1093/mnras/stac3184
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Galaxies: structure, galaxies: kinematics and dynamics, methods: numerical
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10159672
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