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Ghost-free Palatini derivative scalar–tensor theory: Desingularization and the speed test
/ Gal'tsov, Dmitri ; Zhidkova, Sophia
We disclose remarkable features of the scalar–tensor theory with the derivative coupling of the scalar field to the curvature in the Palatini formalism. [...]
Published in Physics letters B 790 (2019) 453-457
10.1016/j.physletb.2019.01.061
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Higher- n triangular dilatonic black holes
/ Zadora, Anton ; Gal'tsov, Dmitri V. ; Chen, Chiang-Mei
Dilaton gravity with the form fields is known to possess dyon solutions with two horizons for the discrete “triangular” values of the dilaton coupling constant a=n(n+1)/2 . [...]
Published in Physics letters B (2018)
10.1016/j.physletb.2018.02.017
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On the Smarr formula for rotating dyonic black holes
/ Clément, Gérard ; Gal'tsov, Dmitri
We revisit the derivation by Tomimatsu of the generalized Komar integrals giving the mass and angular momentum of rotating Einstein–Maxwell black holes. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.08.041
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A tale of two dyons
/ Clément, Gérard ; Gal'tsov, Dmitri
We present a one-parameter family of stationary, asymptotically flat solutions of the Einstein–Maxwell equations with only a mild singularity, which are endowed with mass, angular momentum, a dipole magnetic moment and a quadrupole electric moment. [...]
Published in Physics letters B (2017)
10.1016/j.physletb.2017.05.096
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Rehabilitating space-times with NUTs
/ Clément, Gérard ; Gal'tsov, Dmitri ; Guenouche, Mourad
We revisit the Taub–NUT solution of the Einstein equations without time periodicity condition, showing that the Misner string is still fully transparent for geodesics. [...]
Published in Physics letters B (2015)
10.1016/j.physletb.2015.09.074
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“Triangular” extremal dilatonic dyons
/ Gal'tsov, Dmitri ; Khramtsov, Mikhail ; Orlov, Dmitri
Explicit dyonic solutions in four-dimensional Einstein–Maxwell-dilaton theory are known only for three particular values of the dilaton coupling constant: a=0,1,3 . [...]
Published in Physics letters B (2015)
10.1016/j.physletb.2015.02.017
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