Spiral structure as a recurrent instability
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Publication:1586001
DOI10.1023/A:1002668818252zbMATH Open0985.85001arXivastro-ph/9909093OpenAlexW3100674347MaRDI QIDQ1586001
Publication date: 15 May 2002
Published in: Astrophysics and Space Science (Search for Journal in Brave)
Abstract: A long-standing controversy in studies of spiral structure has concerned the lifetimes of individual spiral patterns. Much theoretical work has sought quasi-stationary spiral modes while N-body simulations have consistently displayed recurrent, short-lived patterns. The simulations manifest a recurrent cycle of true instabilities related to small-scale features in the angular momentum distribution of particles, with the decay of each instability seeding the growth of the next. Data from the recent Hipparcos mission seem to offer support for the recurrent transient picture.
Full work available at URL: https://arxiv.org/abs/astro-ph/9909093
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