Chaplygin gas may prevent big trip

Details Chaplygin gas may prevent big trip Chaplygin gas may prevent big trip

2005-12-05

arxiv.org/abs/astro-ph/0512117v3

Phys.Lett.B634:106-110,2006

Astronomy and Astrophysics

Astrophysics

6 pages, no figures, uses Revtex. Several typos corrected. References updated

Scientific paper

10.1016/j.physletb.2006.01.060

This paper deals with the study of the accretion of a generalized Chaplygin gas with equation of state $p=-A/\rho^\alpha$ onto wormholes. We have obtained that when dominant energy condition is violated the size of wormhole increases with the scale factor up to a given plateau. On the regime where the dominant energy condition is satisfied our model predicts a steady decreasing of the wormhole size as generalized Chaplygin gas is accreted. Our main conclusion is that the big trip mechanism is prevented in a large region of the physical parameters of the used model.

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