Global monopole surrounded by quintessence-like matter
Abstract
We present new static spherically-symmetric solutions of Einstein equations with the quintessence-like matter surrounding a global monopole. These new solutions of the coupling scalar-Einstein equations are more complicated, which depend on the parameter of equation of state . A gravitating global monopole produces a gravitational field of de Sitter kind outside the core in addition to a solid angular deficit. In the case, we have proved that the solution cannot exist since the density of quintessence-like tends to zero if . As a new feature, these monopoles have the outer horizon depending on both Goldstone field and quintessence-like. Since current observations constrain , new global monopoles have interesting astrophysical applications.
Keywords
Cite
@article{arxiv.0712.0208,
title = {Global monopole surrounded by quintessence-like matter},
author = {Xin-zhou Li and Ping Xi and Xiang-hua Zhai},
journal= {arXiv preprint arXiv:0712.0208},
year = {2008}
}
Comments
8 pages, 8 figures, added discussion and some references, the form accepted for publication in Physics Letter B