Qualitative analysis of two-fluid FRW cosmological models |
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| Authors: | A K Verma |
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| Institution: | (1) Department of Mathematical Sciences and Computer Applications, Bundelkhand University, Jhansi, 284128, Uttar Pradesh, India |
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| Abstract: | This paper focuses attention on a qualitative analysis of the evolution of two-fluid flat FRW cosmological models.In the first
model one of the fluid represents matter content of the universe comoving with respect to the another fluid that is the cosmic
microwave background radiation (CMBR), these two fluids are interacting.The first model is most relevant to describe the scenario
before the recombination epoch when matter and radiation were in an interactive phase and the photons was bound to electron
through Thomson scattering. The second model describe two noninteracting fluids where the matter is comoving to the space-time
coordinates and the CMBR is moving axially, relative to the matter thus modeling the relative velocity between galaxies and
the CMBR (Phys. Rev. Lett. 39:898–901, 1977). This model portray the cosmic evolution in the postrecombination epoch when the two-fluid are noninteracting.In this epoch
the photons got themselves free to form the CMBR being observed presently.
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| Keywords: | Cosmic microwave background radiation Hubble parameter Equilibrium point Bendixson criteria Limit cycles Attractor |
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