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Einstein-Maxwell-scalar black holes: classes of solutions, dyons and extremality

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arxiv 1905.08304 v1 pith:Y5CMBXCT submitted 2019-05-20 hep-th gr-qc

Einstein-Maxwell-scalar black holes: classes of solutions, dyons and extremality

D. Astefanesei , C. Herdeiro , A. Pombo , E. Radu This is my paper
classification hep-th gr-qc
keywords solutionsextremalfunctionblackclassescouplingdyonseinstein-maxwell-scalar
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Spherical black hole (BH) solutions in Einstein-Maxwell-scalar (EMS) models wherein the scalar field is non-minimally coupled to the Maxwell invariant by some coupling function are discussed. We suggest a classification for these models into two classes, based on the properties of the coupling function, which, in particular, allow, or not, the Reissner-Nordstr\"om (RN) BH solution of electrovacuum to solve a given model. Then, a comparative analysis of two illustrative families of solutions, one belonging to each class is performed: $dilatonic$ versus $scalarised$ BHs. By including magnetic charge, that is considering dyons, we show that scalarised BHs can have a smooth extremal limit, unlike purely electric or magnetic solutions. In particular, we study this extremal limit using the entropy function formalism, which provides insight on why both charges are necessary for extremal solutions to exist.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Binary Black Hole Coalescence and the Dynamics of Scalar Hair in Einstein-Maxwell-Scalar Theory

    gr-qc 2026-06 unverdicted novelty 7.0

    Numerical simulations of binary black hole coalescence in EMS theory show dynamic triggering of scalar hair depending on coupling strength and remnant charge.

  2. Spin-Induced Nonlinear Scalarization of Kerr Black Holes in Einstein-scalar-Gauss-Bonnet Gravity

    gr-qc 2026-04 unverdicted novelty 7.0

    Kerr black holes in an EsGB model without linear instability undergo nonlinear scalarization above spin 0.5, existing in a finite low-mass high-spin wedge rather than a narrow band.

  3. Critical phenomenon inside asymptotically flat black holes with spontaneous scalarization

    gr-qc 2025-12 unverdicted novelty 6.0

    Scalarized black holes in EMS theory lack smooth Cauchy horizons and form Kasner singularities, with a scaling relation between Kasner parameter and charge-to-mass ratio near criticality.