Boson Stars with U(1) Symmetric Potentials as Candidates for Black Hole Mimickers

Rezk, Mahmoud; Tarabia, Fawzy Salah; Abdulghaffar, Muhammad Maher

doi:10.21608/ejphysics.2025.353879.1105

Boson Stars with U(1) Symmetric Potentials as Candidates for Black Hole Mimickers

Document Type : Original Article

Authors

¹ Basic Sciences Department, Faculty of Engineering, Modern University for Technology and Information (MTI), 11571 Cairo, Egypt.

² Physics Department, Faculty of Science, Helwan University, 11792 Ain Helwan, Cairo, Egypt

³ Physics Department, Faculty of Science, Helwan University.

10.21608/ejphysics.2025.353879.1105

Abstract

We study the configurations of a spherically symmetric boson star (BS) models with different general self-interaction terms of U(1) symmetry type. We modify these potentials to include only one rescaled dimensionless decay constant as a single control parameter, which results in a small change in the BS configuration, particularly in the star’s maximum mass. We then study these BS configurations in terms of a simple accretion disc model spiraling around the boson star. Through the comparative study of the power spectrum (luminosity) at different values of the decay constants of the different boson star configurations studied corresponding to the different potentials involved in the present study, we found a unique boson star configuration that mimics a particular black hole (BH) configuration for each potential at a given decay constant value. Finally, we lay a blueprint for matching the currently observed gravitational wave signals with the maximum masses of the boson star mimickers we obtained.

Keywords