On the Equation of State for the Lambda Field
Abstract
Recently found accelarated expansion of our Universe is due to the presence of a new kind of matter called "$\Lambda$ - field" or quintessence. The limitations on its equation of state are found from the fact of its unclustering at all scales much smaller than the cosmological horizon. It is discussed how these limitations affect on the possibility to approximate the accelarated expansion by such cosmological models as the model of Chaplygin gas.
- Publication:
-
Astronomy Letters
- Pub Date:
- July 2002
- DOI:
- 10.1134/1.1491965
- arXiv:
- arXiv:gr-qc/0203010
- Bibcode:
- 2002AstL...28..434P
- Keywords:
-
- General Relativity and Quantum Cosmology;
- Astrophysics
- E-Print:
- 7 pages, submitted to "Astronomy Letters", accepted