On the problem of 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.

7 pages, submitted to "Astronomy Letters", accepted; one reference added

References in corpus (1)

• An alternative to quintessence

Cited by in corpus (6)

• Are Chaplygin gases serious contenders to the dark energy throne?
• Unified dark energy thermodynamics: varying w and the -1-crossing
• Transient Accelerated Expansion and Double Quintessence
• Generalized Chaplygin gas as geometrical dark energy
• Instability of Chaplygin gas trajectories in unified dark matter models
• The clustering of dark energy