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Dissipative phenomena in extended-body interactions

By S. Pasetto, G. Bertelli, E. K. Grebel, C. Chiosi and Y. Fujita


Aims. Dissipative phenomena occurring during the orbital evolution of a dwarf satellite galaxy around a host galaxy may leave signatures in the star formation activity and signatures in the colour-magnitude diagram of the galaxy stellar content. Our goal is to reach a simple and qualitative description of these complicated phenomena. Methods. We develop an analytical and numerical technique able to study the ram pressure, Kelvin-Helmholtz instability, Rayleigh-Taylor, and tidal forces acting on the star formation processes in molecular clouds. We consider it with synthetic colour-magnitude diagram techniques. Results. We developed a method of investigating the connections between gas consumption processes and star formation processes in the context of the two extended-body interactions, paying special attention to the dwarf galaxies dynamical regime

Topics: instabilities, plasmas, methods: numerical, galaxies: structure, galaxies: dwarf, galaxies: stellar content
Publisher: 'EDP Sciences'
Year: 2012
DOI identifier: 10.1051/0004-6361/201117612
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