Global Spiral Modes in Star-Forming Gravitating Disks

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Using 2D nonlinear simulations, we study the generation and nonlinear evolution of spiral structure in a star-forming multi-component gravitating disk. We confirm in agreement with previous studies the destabilizing role of a cold gaseous component and extend this conclusion for multi-component star-forming disks exchanging mass and momentum between its components. We show that the spiral structure growing on a non-stationary multi-phase background reaches its saturation in a similar manner like the one-component disks. The spiral structure survives even if most of the gas is transformed into stellar remnants of larger velocity dispersion.
16 pages, 16 figures, Accepted for Astronomy & Astrophysics, Main Journal, a complete version is also available at http://www.astrophysik.uni-kiel.de/papers/papers_aghen/e-theis_99b.html

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/14225

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/9905219
 http://arxiv.org/abs/astro-ph/9905219

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arXiv