Zobrazeno 1 - 10
of 495
pro vyhledávání: '"Bakopoulos, P."'
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
Publikováno v:
JCAP05(2022)022
We construct a large class of explicit, asymptotically flat and regular wormhole solutions in higher order scalar tensor theories. The solutions are vacuum solutions of scalar tensor theory and no matter (exotic or regular) is introduced in order to
Externí odkaz:
http://arxiv.org/abs/2111.09857