Global monopole surrounded by quintessence-like matter
Xin-zhou Li, Ping Xi, Xiang-hua Zhai

TL;DR
This paper finds new static solutions for global monopoles surrounded by quintessence-like matter, revealing complex gravitational fields and horizons influenced by the equation of state parameter, with potential astrophysical implications.
Contribution
It introduces novel solutions for global monopoles with quintessence-like matter, extending understanding of their gravitational properties and horizons in Einstein's equations.
Findings
Monopoles produce de Sitter-like gravitational fields outside the core.
Outer horizons depend on both Goldstone and quintessence fields.
Solutions do not exist at w_q = -1/3 due to density behavior.
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.
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