Statefinder Diagnostic for Variable Modified Chaplygin Gas in LRS Bianchi Type I Universe
The Locally Rotationally Symmetric (LRS) Bianchi type I cosmological model with variable modified Chaplygin gas having the equation of state 𝑝=𝐴𝜌−𝐵/𝜌𝛼, where 0≤𝛼≤1, 𝐴 is a positive constant, and 𝐵 is a positive function of the average-scale factor 𝑎(𝑡) of the universe (i.e., 𝐵=𝐵(𝑎)) has been studied...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Advances in Mathematical Physics |
| Online Access: | http://dx.doi.org/10.1155/2012/714350 |
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| Summary: | The Locally Rotationally Symmetric (LRS) Bianchi type I cosmological model with variable modified Chaplygin gas having the equation of state 𝑝=𝐴𝜌−𝐵/𝜌𝛼, where 0≤𝛼≤1, 𝐴 is a positive constant, and 𝐵 is a positive function of the average-scale factor 𝑎(𝑡) of the universe (i.e., 𝐵=𝐵(𝑎)) has been studied. It is shown that the equation of state of the variable modified Chaplygin gas interpolates from radiation-dominated era to quintessence-dominated era. The statefinder diagnostic pair (i.e., {𝑟,𝑠} parameter) is adopted to characterize different phases of the universe. |
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| ISSN: | 1687-9120 1687-9139 |