Spontaneous scalarization of regular Hayward black holes in Einstein-nonlinear electromagnetic-scalar gravity
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909861116116992 |
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| author | Cai, Lan-Lan Lai, Meng-Yun Zou, De-Cheng Zhang, Lina Huang, Hyat |
| author_facet | Cai, Lan-Lan Lai, Meng-Yun Zou, De-Cheng Zhang, Lina Huang, Hyat |
| contents | In this paper, we discuss the spontaneous scalarization of Hayward black holes in Einstein-nonlinear electromagnetic-scalar gravity. Taking into account the tachyonic instability, we obtain scalarized charged black holes (SCBHs) with quadratic (1-$αφ^2$) and exponential ($e^{-αφ^2}$) couplings, respectively. Moreover, these SCBHs can be labelled by the number of $n = 0, 1, 2,...$, where $n = 0$ is called the fundamental black hole and $n = 1, 2,...$ denote the $n$-excited black holes. We recover 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18354 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spontaneous scalarization of regular Hayward black holes in Einstein-nonlinear electromagnetic-scalar gravity Cai, Lan-Lan Lai, Meng-Yun Zou, De-Cheng Zhang, Lina Huang, Hyat General Relativity and Quantum Cosmology In this paper, we discuss the spontaneous scalarization of Hayward black holes in Einstein-nonlinear electromagnetic-scalar gravity. Taking into account the tachyonic instability, we obtain scalarized charged black holes (SCBHs) with quadratic (1-$αφ^2$) and exponential ($e^{-αφ^2}$) couplings, respectively. Moreover, these SCBHs can be labelled by the number of $n = 0, 1, 2,...$, where $n = 0$ is called the fundamental black hole and $n = 1, 2,...$ denote the $n$-excited black holes. We recover 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. |
| title | Spontaneous scalarization of regular Hayward black holes in Einstein-nonlinear electromagnetic-scalar gravity |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2510.18354 |