Year: 2024
Type: article
Abstract: We study the spontaneous scalarization of Bardeen black holes, whose tachyonic instability triggers the formation of scalarized charged black holes (SCBHs). In this case, we find infinite ($n=0,1,2,\dots{}$) branches of SCBHs with magnetic charge $g$. The $n=0$ branch of SCBHs can be found for the coupling parameter $\ensuremath{\alpha}\ensuremath{\ge}{\ensuremath{\alpha}}_{n=0}(g)$ with both quadratic ($1\ensuremath{-}\ensuremath{\alpha}{\ensuremath{\varphi}}^{2}$) and exponential (${e}^{\ensuremath{-}\ensuremath{\alpha}{\ensuremath{\varphi}}^{2}}$) couplings, where ${\ensuremath{\alpha}}_{n=0}(g)$ represents the threshold of tachyonic instability for the Bardeen black holes. Furthermore, it is shown that the $n=0$ branch for both couplings is stable against radial perturbations. This stability shows that this branch can be used for further observational implications.
Authors: Lina Zhang, Qiyuan Pan, Yun Soo Myung, De-Cheng Zou
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4405424029