4 papers
Carrollian limit of NS-NS and Heterotic Supergravity
Romina Ballesteros, Eric Lescano, Sergio Patiño-López
We construct the Carrollian limit of NS--NS and heterotic supergravity through an ultra-relativistic expansion of the fields. An appropriate scaling of the dilaton renders the meas…
Non-closed scalar charge in four-dimensional Einstein-scalar-Gauss-Bonnet black hole thermodynamics
Romina Ballesteros, Marcela Cárdenas, Eric Lescano
We develop a covariant differential-form framework to define scalar charges for stationary, asymptotically flat black holes in --dimensional Einstein-scalar-Gauss-Bonnet gravity…
Kosmann derivative and momentum maps from a duality covariant framework
Romina Ballesteros, Eric Lescano, Jesús A. RodrÃguez
A covariant implementation of diffeomorphisms in the presence of local symmetries is a nontrivial aspect of gravitational theories. In Double Field Theory, this is achieved through…
Generalized Komar charges and Smarr formulas for black holes and boson stars
Romina Ballesteros, Tomas Ortin
The standard Komar charge is a -form that can be defined in spacetimes admitting a Killing vector and which is closed when the vacuum Einstein equations are satisfied. Its i…