Combining EHT shadow observations of M87* and Sgr A* with mass and distance priors yields 95% upper limits Q < 0.391 and v < 4.153 on the ModMax black hole charge and nonlinearity parameter.
Weakly magnetized black holes in Einstein-ModMax theory
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abstract
Theories of non-linear electrodynamics inherently describe deviations from Maxwell theory in the strong field regime. Among these, ModMax electrodynamics stands out as a unique one-parameter generalization of Maxwell theory that preserves both conformal invariance and electromagnetic duality. In this paper, we investigate the extension of Wald's magnetization within the framework of Einstein-ModMax theory, concentrating on static charged and accelerating black holes. Additionally, we examine the influence of external magnetic fields on the motion of charged test particles in the vicinity of a charged black hole.
fields
gr-qc 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
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Constraining ModMax Black Holes with EHT and GRAVITY Observations: Optical Signatures and Accretion Disk Properties
Combining EHT shadow observations of M87* and Sgr A* with mass and distance priors yields 95% upper limits Q < 0.391 and v < 4.153 on the ModMax black hole charge and nonlinearity parameter.