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Cosmology with a variable Chaplygin gas |
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| Authors: | Zong-Kuan Guo Yuan-Zhong Zhang |
| Affiliation: | 1. Department of Physics, Kinki University, Higashi-Osaka, Osaka 577-8502, Japan;2. CCAST (World Lab.), P.O. Box 8730, Beijing 100080, China;3. Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China |
| Abstract: | We consider a new generalized Chaplygin gas model that includes the original Chaplygin gas model as a special case. In such a model the generalized Chaplygin gas evolves as from dust to quiescence or phantom. We show that the background evolution for the model is equivalent to that for a coupled dark energy model with dark matter. The constraints from the current type Ia supernova data favour a phantom-like Chaplygin gas model. |
| Keywords: | 98.80.Es 98.80.Cq |
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