期刊
MODERN PHYSICS LETTERS A
卷 35, 期 35, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732320502910
关键词
Nonlinear electrodynamics; magnetic black holes; M87*black hole; shadow of black holes
We consider rational nonlinear electrodynamics with the Lagrangian Script capital L = -F/(1 + 2 beta F) (F = (1/4)F mu nu F mu nu is the Lorentz invariant), proposed in Ref. 63, coupled to General Relativity. The effective geometry induced by nonlinear electrodynamics corrections are found. We determine shadow's size of regular non-rotating magnetic black holes and compare them with the shadow size of the super-massive M87* black hole imaged by the Event Horizon Telescope collaboration. Assuming that the black hole mass has a pure electromagnetic nature, we obtain the black hole magnetic charge. The size of the shadow obtained is very close to the shadow size of non-regular neutral Schwarzschild black holes. As a result, we can interpret the super-massive M87* black hole as a regular (without singularities) magnetized black hole.
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