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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| Acceso en línea: | https://arxiv.org/abs/2603.16701 |
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| _version_ | 1866914402434809856 |
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| author | Chen, Shun Chew, Xiao Yan Kunz, Jutta |
| author_facet | Chen, Shun Chew, Xiao Yan Kunz, Jutta |
| contents | We investigate dyonic nonlinearly scalarized black holes in Einstein-Maxwell-scalar theory. The domain of existence of scalarized dyonic black holes consists of three branches. The cold branch and the hot branch bifurcate at a minimal value of the charge, analogous to the purely electrically charged scalarized black holes. However, the presence of both charges allows for regular extremal black holes, leading to a third branch featuring a sudden plunge in Hawking temperature. In fact, the presence of both electromagnetic charges introduces a factor $Δ(ϕ)$ in the source term of scalar field equations that vanishes when the coupling function $f(ϕ)$ equals the ratio of the charges for some value of the scalar field $ϕ_c$. The scalar field of extremal black holes assumes precisely this value at the horizon, $ϕ_H=ϕ_c$. We demonstrate the plunge for the coupling function $f(ϕ)=\exp(αϕ^3)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_16701 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Dyonic Einstein-Maxwell-scalar black holes: the cold, the hot and the plunge Chen, Shun Chew, Xiao Yan Kunz, Jutta General Relativity and Quantum Cosmology We investigate dyonic nonlinearly scalarized black holes in Einstein-Maxwell-scalar theory. The domain of existence of scalarized dyonic black holes consists of three branches. The cold branch and the hot branch bifurcate at a minimal value of the charge, analogous to the purely electrically charged scalarized black holes. However, the presence of both charges allows for regular extremal black holes, leading to a third branch featuring a sudden plunge in Hawking temperature. In fact, the presence of both electromagnetic charges introduces a factor $Δ(ϕ)$ in the source term of scalar field equations that vanishes when the coupling function $f(ϕ)$ equals the ratio of the charges for some value of the scalar field $ϕ_c$. The scalar field of extremal black holes assumes precisely this value at the horizon, $ϕ_H=ϕ_c$. We demonstrate the plunge for the coupling function $f(ϕ)=\exp(αϕ^3)$. |
| title | Dyonic Einstein-Maxwell-scalar black holes: the cold, the hot and the plunge |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2603.16701 |