The Revival of the unified dark energy - dark matter model?
Jul, 20046 pages
Published in:
- Phys.Rev.D 70 (2004) 083519
e-Print:
- astro-ph/0407239 [astro-ph]
Report number:
- DF-IST-6-2004
View in:
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Abstract: (arXiv)
We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark matter components once phantom-like dark energy is excluded. Within this framework, we study structure formation and show that difficulties associated to unphysical oscillations or blow-up in the matter power spectrum can be circumvented. Furthermore, we show that the dominance of dark energy is related to the time when energy density fluctuations start deviating from the linear behaviour.- 98.80.Cq
- dark energy
- dark matter
- gas: Chaplygin
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