Measuring bar pattern speeds from single simulation snapshots
| Autor: | Walter Dehnen, Ralph Schoenrich, Marcin Semczuk |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Popis: | We describe methods to measure simultaneously the orientation angle $\psi$ and pattern speed $\Omega$ from single snapshots of simulated barred galaxies. Unlike previous attempts, our approach is unbiased, precise, and consistent in the sense that $\psi=\int\Omega\mathrm{d}t$. It can be extended to obtain the rate and axis of rotation, i.e. the vector $\boldsymbol{\Omega}$. We provide computer code implementing our method. Comment: 7 pages, accepted at MNRAS; v2: clarified discussion of previous work |
| Databáze: | OpenAIRE |
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