Astrophysics, abstract
astro-ph/0512117

From: Jos\'e Antonio Jim\'enez Madrid [view email]

Date (v1): Mon, 5 Dec 2005 18:16:18 GMT (11kb)
Date (revised v2): Fri, 27 Jan 2006 16:46:25 GMT (12kb)

Chaplygin gas may prevent big trip

Authors: José A. Jiménez Madrid (IAA, Granada & IMAFF, Madrid)

Comments: 6 pages, no figures, uses Revtex. Version accepted for publication in Physics Letters B. Discussion of results revised and expanded. Seven new references have been also included

Report-no: IMAFF-RCA-05-11

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.

http://arxiv.org/abs/astro-ph/0512117