MG13 - Talk detail |
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Participant |
Kittou, Georgia | |||||||
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Institution |
University of the Aegean Samos Greece - VLAMARIS 36 - VATHI SAMOU - GREECE - Cyprus | |||||||
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Session |
GT2 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Singularities in cosmologies with energy exchange | |||||
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Abstract |
We study the dynamics near finite-time singularities of flat isotropic universes filled with two interacting but otherwise arbitrary perfect fluids. The overall dynamical picture reveals a variety of asymptotic solutions valid locally around the spacetime singularity. We find the attractor of all solutions with standard decay, and for `phantom' matter asymptotically at early times. We give a number of special asymptotic solutions describing universes collapsing to zero size and others ending at a big rip singularity. We also find a very complicated singularity corresponding to a logarithmic branch point that resembles a cyclic universe, and give an asymptotic local series representation of the general solution in the neighborhood of infinity. |
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