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Jeans instability of a galactic disk embedded in a live dark halo - MaRDI portal

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Jeans instability of a galactic disk embedded in a live dark halo

From MaRDI portal
Publication:5427173

DOI10.1051/0004-6361:20077372zbMATH Open1128.85003arXiv0704.1766OpenAlexW3099910884WikidataQ68624374 ScholiaQ68624374MaRDI QIDQ5427173

Author name not available (Why is that?)

Publication date: 19 November 2007

Published in: (Search for Journal in Brave)

Abstract: We investigate the Jeans instability of a galactic disk embedded in a dynamically responsive dark halo. It is shown that the disk-halo system becomes nominally Jeans unstable. On small scales the instability is suppressed, if the Toomre stability index Q_T is higher than a certain threshold, but on large scales the Jeans instability sets invariably in. However, using a simple self-consistent disk-halo model it is demonstrated that this occurs on scales which are much larger than the system so that this is indeed only a nominal effect. From a practical point of view the Jeans instability of galactic disks is not affected by a live dark halo.


Full work available at URL: https://arxiv.org/abs/0704.1766




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