How to Test Stringy Dark Energy?

Details How to Test Stringy Dark Energy? How to Test Stringy Dark Energy?

2002-09-02

arxiv.org/abs/astro-ph/0209037v2

Phys.Lett. B555 (2003) 139-143

Astronomy and Astrophysics

Astrophysics

4 pages LaTeX. v2. Typos corrected

Scientific paper

10.1016/S0370-2693(03)00055-8

It is suggested, by using a covariant lagrangian formalism to estimate the equation of state $w = p/\rho$, that stringy dark energy predicts $w < -1$, a negative pressure larger in magnitude than that for a cosmological constant or quintessence. This would lead to a later transition from decelerating to accelerating cosmological expansion; $w = - 4/3$ is briefly considered as one illustrative example.

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