Confinement of exotic matter: Static solutions

Víctor Jaramillo, Erik Jiménez-Vázquez, and Darío Núñez
Phys. Rev. D 107, 064061 – Published 27 March 2023

Abstract

We present the E-boson star; a novel configuration of a boson star with an exotic matter nucleus with the exotic matter being described by a real massive scalar field with self-interaction term and kinetic term of the opposite sign. The other scalar field is canonical, so that the system is similar to the material component of the quintom cosmological scenario. Considering the static spherical symmetric case, we obtain cases where both fields are distributed as concentric spheres, and others with the remarkable feature that the canonical matter is pushed outwards and obtain a shell-like distribution of the canonical field, with a nucleus of exotic matter at the center. We present global properties of such E-boson stars and stress the differences that these configuration have with respect to the usual boson stars. In particular, we obtain cases where the compactness goes beyond the Buchdahl limit.

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  • Received 20 February 2023
  • Accepted 14 March 2023

DOI:https://doi.org/10.1103/PhysRevD.107.064061

© 2023 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Víctor Jaramillo, Erik Jiménez-Vázquez, and Darío Núñez

  • Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, Cd. Mx. 04510, Mexico

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Issue

Vol. 107, Iss. 6 — 15 March 2023

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