3 papers
gr-qc2025
Theoretical filters for shift-symmetric Horndeski gravities
Athanasios Bakopoulos, Christos Charmousis, Nikos Chatzifotis +1
We investigate the structure of nontrivial maximally symmetric vacua and compact-object solutions in shift-symmetric scalar-tensor theories. Focusing on Horndeski gravity, we deriv…
hep-th2024
Thermodynamics of black holes featuring primary scalar hair
Athanasios Bakopoulos, Nikos Chatzifotis, Thanasis Karakasis
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 grav…
gr-qc2024
Compact objects with primary hair in shift and parity symmetric beyond Horndeski gravities
Athanasios Bakopoulos, Nikos Chatzifotis, Theodoros Nakas
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…