The jeans instability criterion for a compressible fluid including viscosity and heat conduction |
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| Authors: | M G Corona-Galindo H Dehnen |
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| Institution: | (1) Optica y Electrónica, Instituto Nacional de Astrofísica, Puebla, México;(2) Universität Konstanz Fakultät für Physik, Konstanz, F.R.G. |
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| Abstract: | For the region after the recombination era of the Universe the hydrodynamical density waves are analyzed including shear viscosity and heat conduction for  =c as well as for <c(c is the critical density of the Universe). Very near to the end of the recombination era (z=1200) we find the well-known Jeans instability. It is shown that the influence of the shear viscosity on the instabilities in negligible, however, a visible influence of the bulk viscosity is present. |
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