2023
DOI: 10.48550/arxiv.2302.14775
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A variant on the mechanism for bar instabilities

Abstract: The problem of how disc galaxies avoid forming bars remains unsolved. Many galaxy models having reasonable properties continue to manifest vigorous instabilities that rapidly form strong bars and no widely-accepted idea has yet been advanced to account for why this does not generally happen in most disc galaxies. The unstable mode that is responsible for bar formation is believed to be a standing wave in a cavity that reflects off the disc centre and the corotation radius, with amplification at corotation. Her… Show more

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