Properties of global monopoles with an event horizon
Takashi Tamaki (Kyoto University), Nobuyuki Sakai (Yamagata, University)
TL;DR
This paper explores the characteristics of global monopoles with event horizons, revealing unstable orbits and potential implications for galactic halo modeling.
Contribution
It provides new insights into the properties of monopoles with horizons, including orbit stability and asymptotic solution forms, and discusses their astrophysical relevance.
Findings
Existence of unstable circular orbits without angular momentum for negative core mass
Asymptotic solutions for large event horizons
Discussion on monopoles as galactic halo models
Abstract
We investigate the properties of global monopoles with an event horizon. We find that there is an unstable circular orbit even if a particle does not have an angular momentum when the core mass is negative. We also obtain the asymptotic form of solutions when the event horizon is much larger than the core radius of the monopole, and discuss if they could be a model of galactic halos.
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