Zobrazeno 1 - 10
of 961
pro vyhledávání: '"A. Bakopoulos"'
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-35 (2022)
Abstract We analyse in all generality beyond Horndeski theories of shift symmetry in a static and spherically symmetric spacetime. By introducing four auxiliary functions, we write the field equations in a particularly compact form. We show that assu
Externí odkaz:
https://doaj.org/article/a4e91abb125040a7a6f31b5d632740d1
Using Euclidean methods we investigate the thermodynamics of stealth black hole solutions, which are solutions that geometrically are indistinguishable from those of general relativity, however they are accompanied by a non-trivial additional field t
Externí odkaz:
http://arxiv.org/abs/2410.14451
In this work, we embark on the thermodynamic investigation concerning a family of primary charged black holes within the context of shift and parity symmetric Beyond Horndeski gravity. Employing the Euclidean approach, we derive the functional expres
Externí odkaz:
http://arxiv.org/abs/2404.07522
Autor:
Bakopoulos, Athanasios, Karakasis, Thanasis, Mavromatos, Nick E., Nakas, Theodoros, Papantonopoulos, Eleftherios
Publikováno v:
Phys.Rev.D 110 (2024) 2, 024014
We consider higher-order derivative gauge field corrections that arise in the fundamental context of dimensional reduction of String Theory and Lovelock-inspired gravities and obtain an exact and asymptotically flat black-hole solution, in the presen
Externí odkaz:
http://arxiv.org/abs/2402.12459
Publikováno v:
Phys. Rev. D 110, (2024) 024044
In this work, we delve into the model of the shift symmetric and parity-preserving Beyond Horndeski theory in all its generality. We present an explicit algorithm to extract static and spherically symmetric black holes with primary scalar charge adhe
Externí odkaz:
http://arxiv.org/abs/2312.17198
Autor:
Bakopoulos, Athanasios, Charmousis, Christos, Kanti, Panagiota, Lecoeur, Nicolas, Nakas, Theodoros
We present explicit black holes endowed with primary scalar hair within the shift-symmetric subclass of Beyond Horndeski theories. These solutions depend, in addition to the conventional mass parameter, on a second free parameter encoding primary sca
Externí odkaz:
http://arxiv.org/abs/2310.11919
In this work we are revisiting the well studied Ellis wormhole solution in a generalized Horndeski theory motivated from the Kaluza-Klein compactification procedure of the more fundamental higher dimensional Lovelock gravity. We show that the Ellis w
Externí odkaz:
http://arxiv.org/abs/2306.16768
In the framework of a simple gravitational theory that contains a scalar field minimally coupled to gravity, we investigate the emergence of analytic black-hole solutions with non-trivial scalar hair of secondary type. Although it is possible for one
Externí odkaz:
http://arxiv.org/abs/2303.09116
We briefly discuss explicit compact object solutions in higher-order scalar-tensor theories. We start by so-called stealth solutions, whose metric are General Relativity (GR) solutions, but accompanied by a non-trivial scalar field, in both spherical
Externí odkaz:
http://arxiv.org/abs/2209.09499
Publikováno v:
JHEP 08 (2022) 055
We analyse in all generality beyond Horndeski theories of shift symmetry in a static and spherically symmetric spacetime. By introducing four auxiliary functions, we write the field equations in a particularly compact form. We show that assuming addi
Externí odkaz:
http://arxiv.org/abs/2203.14595