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

8 pages, 8 figures, added discussion and some references, the form accepted for publication in Physics Letter B

References in corpus (1)

• Gravitating Global k-monopole