Dilaton gravity, (quasi-) black holes, and scalar charge

Electrically charged dust is considered in the framework of Einstein–Maxwell–dilaton gravity with a Lagrangian containing the interaction term (Formula presented), where (Formula presented) is an arbitrary function of the dilaton scalar field (Formula presented), which can be normal or phantom. Without assumption of spatial symmetry, we show that static configurations exist for arbitrary functions (Formula presented) ((Formula presented)) and (Formula presented). If (Formula presented), the classical Majumdar–Papapetrou (MP) system is restored. We discuss solutions that represent black holes (BHs) and quasi-black holes (QBHs), deduce some general results and confirm them by examples. In particular, we analyze configurations with spherical and cylindrical symmetries. It turns out that cylindrical BHs and QBHs cannot exist without negative energy density somewhere in space. However, in general, BHs and QBHs can be phantom-free, that is, can exist with everywhere nonnegative energy densities of matter, scalar and electromagnetic fields. © 2014, Springer Science+Business Media New York.

Авторы
Bronnikov K.A. 1, 2, 3 , Fabris J.C.4 , Silveira R.4 , Zaslavskii O.B.5, 6
Редакторы
-
Издательство
-
Номер выпуска
9
Язык
Английский
Страницы
-
Статус
Опубликовано
Подразделение
-
Номер
-
Том
46
Год
2014
Организации
  • 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, Al. Nevsky St. 14, Kaliningrad, 236041, Russian Federation
  • 4 Departamento de Física, Universidade Federal do Espírito Santo, Av. Fernando Ferrari 514, Campus de Goiabeiras, Vitória, ES CEP 29075-910, 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
Ключевые слова
Black holes; Dilaton; Majumdar–Papapetrou systems; Quasiblack holes
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/5070/