English

Global monopole surrounded by quintessence-like matter

General Relativity and Quantum Cosmology 2008-11-26 v3 Astrophysics High Energy Physics - Theory

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 1<wq<1/3-1 < w_{q} <-{1/3}. A gravitating global monopole produces a gravitational field of de Sitter kind outside the core in addition to a solid angular deficit. In the wq=1/3w_{q} = -{1/3} case, we have proved that the solution cannot exist since the density of quintessence-like tends to zero if wq1/3w_{q} \to -{1/3}. As a new feature, these monopoles have the outer horizon depending on both Goldstone field and quintessence-like. Since current observations constrain 1.14<wq<0.93-1.14 < w_{q} < -0.93, 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

R2 v1 2026-06-21T09:49:38.771Z