Interventional Medicine and Applied Science.
Akademiai Kiado Rt..
Vol. 6.
2014.
P. 75-84
Dilaton gravity, charged dust, and (quasi-) black holes
We consider Einstein-Maxwell-dilaton gravity with charged dust and interaction of the form P(χ)FμνFμν, where P(χ) is an arbitrary function of the dilaton field χ that can be normal or phantom. For any regular P(χ), static configurations are possible with arbitrary functions g00=exp(2γ(xi)) (i=1, 2, 3) and χ=χ(γ), without any assumption of spatial symmetry. The classical Majumdar-Papapetrou system is restored by putting χ=const. Among possible solutions are black-hole (BH) and quasi-black-hole (QBH) ones. Some general results on BH and QBH properties are deduced and confirmed by examples. It is found, in particular, that asymptotically flat BHs and QBHs can exist with positive energy densities of matter and both scalar and electromagnetic fields. © 2014 American Physical Society.
Authors
Bronnikov K.A.
1,
2,
3
,
Fabris J.C.4
,
Silveira R.4
,
Zaslavskii O.B.5,
6
Number of issue
10
Language
English
Status
Published
Link
Number
107501
Volume
89
Year
2014
Organizations
- 1 Center for Gravitation and Fundamental Metrology, VNIIMS, 46 Ozyornaya Street, Moscow 119361, Russian Federation
- 2 Institute of Gravitation and Cosmology, PFUR, 6 Miklukho-Maklaya Street, Moscow 117198, Russian Federation
- 3 I. Kant Baltic Federal University, Alexander Nevsky Street 14, Kaliningrad 236041, Russian Federation
- 4 Departamento de Física, Universidade Federal Do Espírito Santo, Campus de Goiabeiras, Avenida Fernando Ferrari 514, CEP 29075-910 Vitória, Espirito Santo, Brazil
- 5 Department of Physics and Technology, Kharkov V. N. Karazin National University, 4 Svoboda Square, Kharkov 61077, Ukraine
- 6 Institute of Mathematics and Mechanics, Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
Date of creation
19.10.2018
Date of change
19.10.2018
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Medical Devices: Evidence and Research.
Dove Medical Press.
Vol. 7.
2014.
P. 91-97