48 citations · 76 across the 7 of their papers we have counts for
6 papers · 1 filter
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…
Kosmann derivative and momentum maps from a duality covariant framework
Romina Ballesteros, Eric Lescano, Jesús A. Rodríguez
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…
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…
On the existence of thermodynamically stable asymptotically flat black holes
Dumitru Astefanesei, Romina Ballesteros, Paulina Cabrera +2
We use the quasilocal formalism of Brown and York, supplemented with counterterms, to investigate the thermodynamics of asymptotically flat black holes. We consider two families of…
On scalar charges and black-hole thermodynamics
Romina Ballesteros, Carmen Gómez-Fayrén, Tomás Ortín +1
We revisit the first law of black hole thermodynamics in 4-dimensional theories containing scalar and Abelian vector fields coupled to gravity using Wald's formalism and a new defi…
Scalar charges and the first law of black hole thermodynamics
Dumitru Astefanesei, Romina Ballesteros, David Choque +1
We present a variational formulation of Einstein-Maxwell-dilaton theory in flat spacetime, when the asymptotic value of the scalar field is not fixed. We obtain the boundary terms…