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Cosmology in cubic and f(P) gravity
Erices-Osorio, Cristián R.; Papantonopoulos, Eleftherios; Saridakis, Emmanuel N. (2019)We construct cubic gravity and its f(P) extension and we investigate their early- and late-time cosmological applications. Cubic gravity is based on a particular invariant P, constructed from cubic contractions of the ...
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Hairy black holes in disformal scalar-tensor gravity theories
Erices-Osorio, Cristián R.; Filis, Pantelis; Papantonopoulos, Eleftherios (2021)We show that the no-hair theorem for scalar-tensor theories with bimetric structure can be evaded. We find that hairy black hole solutions in the presence of an electric charge admit anti-de Sitter (AdS), flat or de Sitter ...
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Stealth Ellis wormholes in Horndeski theories
Bakopoulos, Athanasios; Chatzifotis, Nikos; Erices-Osorio, Cristián R.; Papantonopoulos, Eleftherios (2023)In this work we are revisiting the well studied Ellis wormhole solution in a Horndeski theory motivated from the Kaluza-Klein compactification procedure of the more fundamental higher dimensional Lovelock gravity. We show ...