Mixed neutron-star-plus-wormhole systems: Equilibrium configurations
Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihaus, Jutta, Kunz
TL;DR
This paper explores equilibrium configurations combining neutron star matter and phantom scalar fields, demonstrating the existence of stable, asymptotically flat solutions with potential implications for understanding exotic astrophysical objects.
Contribution
It introduces new static, regular solutions for mixed neutron-star and wormhole systems, analyzing their stability based on core density and wormhole size.
Findings
Existence of stable, asymptotically flat solutions
Stability depends on core density and wormhole size
Configurations can be gravitationally bound and regular
Abstract
We study gravitationally bound, spherically symmetric equilibrium configurations consisting of ordinary (neutron-star) matter and of a phantom/ghost scalar field which provides the nontrivial topology in the system. For such mixed configurations, we show the existence of static, regular, asymptotically flat general relativistic solutions. Based on the energy approach, we discuss the stability as a function of the core density of the neutron matter for various sizes of the wormhole throat.
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