Nonminimal global monopoles and bound orbits
Ulises Nucamendi (ICN-UNAM,CINVESTAV-IPN), Marcelo Salgado (ICN-UNAM), and Daniel Sudarsky(ICN-UNAM)
TL;DR
This paper investigates the gravitational effects of nonminimally coupled global monopoles, revealing conditions for bound orbits and analyzing potential observable signatures like star rotation curves.
Contribution
It introduces a numerical analysis of nonminimally coupled global monopoles, showing the existence of bound orbits unlike the minimal coupling case.
Findings
Existence of attractive regions allowing bound orbits
Behavior of frequency shifts related to star rotation curves
Differences from minimal coupling monopole models
Abstract
We perform a numerical analysis of the gravitational field of a global monopole coupled nonminimally to gravity, and find that, for some given nonminimal couplings (in constrast with the minimal coupling case), there is an attractive region where bound orbits exist. We exhibit the behavior of the frequency shifts that would be associated with `rotation curves' of stars in circular orbits in the spacetimes of such global monopoles.
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