Hydrodynamical modes and gravitational instabilities in the Universe during the recombination era |
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| Authors: | M G Corona-Galindo H Dehnen D Ebner |
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| Institution: | (1) Instituto Nacional de Astrofisica Optica y Electrónica, Puebla, México;(2) Fakultät für Physik, Universität Konstanz, Germany |
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| Abstract: | We assume the Universe during the recombination era as a three-component fluid constituted by neutral hydrogen, plasma, and radiation; such fluids are coupled via the effects of photorecombination, photoionization, and Thomson scattering. The hydrodynamical modes are calculated and the relation with the gravitational instabilities is established. In addition to the well-known Jeans's instability modes two additional ones in the neighbourhood of 1013
M
 are obtained in the case of an open Universe. |
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