All Outputs (5)

Ringdowns for black holes with scalar hair: The large mass case (2024)
Journal Article
D’Addario, G., Padilla, A., Saffin, P. M., Sotiriou, T. P., & Spiers, A. (2024). Ringdowns for black holes with scalar hair: The large mass case. Physical Review D, 109(8), Article 084046. https://doi.org/10.1103/physrevd.109.084046

Deviations from general relativity can alter the quasinormal mode (QNM) ringdown of perturbed black holes. It is known that a shift-symmetric (hence massless) scalar can only introduce black hole hair if it couples to the Gauss-Bonnet invariant, in w... Read More about Ringdowns for black holes with scalar hair: The large mass case.

Measuring scalar charge with compact binaries: High accuracy modeling with self-force (2024)
Journal Article
Spiers, A., Maselli, A., & Sotiriou, T. P. (2024). Measuring scalar charge with compact binaries: High accuracy modeling with self-force. Physical Review D, 109(6), Article 064022. https://doi.org/10.1103/physrevd.109.064022

Using the self-force approach, we present the premier first-post-adiabatic accuracy formalism for modeling compact binaries in theories with a massless scalar field nonminimally coupled to gravity. We limit the binary secondary to being a non-spinnin... Read More about Measuring scalar charge with compact binaries: High accuracy modeling with self-force.

Spontaneous scalarization (2024)
Journal Article
Doneva, D. D., Ramazanoǧlu, F. M., Silva, H. O., Sotiriou, T. P., & Yazadjiev, S. S. (2024). Spontaneous scalarization. Reviews of Modern Physics, 96(1), Article 015004. https://doi.org/10.1103/revmodphys.96.015004

Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron stars and black holes, with a scalar-field configuration. It resembles a phase transition in that the scalar configuration appears only when a certain quantity... Read More about Spontaneous scalarization.

Spherical collapse in scalar-Gauss-Bonnet gravity: Taming ill-posedness with a Ricci coupling (2024)
Journal Article
Thaalba, F., Bezares, M., Franchini, N., & Sotiriou, T. P. (2024). Spherical collapse in scalar-Gauss-Bonnet gravity: Taming ill-posedness with a Ricci coupling. Physical Review D, 109(4), L041503. https://doi.org/10.1103/physrevd.109.l041503

We study spherical collapse of a scalar cloud in scalar-Gauss-Bonnet gravity—a theory in which black holes can develop scalar hair if they are in a certain mass range. We show that an additional quadratic coupling of the scalar field to the Ricci sca... Read More about Spherical collapse in scalar-Gauss-Bonnet gravity: Taming ill-posedness with a Ricci coupling.

Incompatibility of gravity theories with auxiliary fields with the standard model (2024)
Journal Article
Ventagli, G., Pani, P., & Sotiriou, T. P. (2024). Incompatibility of gravity theories with auxiliary fields with the standard model. Physical Review D, 109(4), Article 044002. https://doi.org/10.1103/physrevd.109.044002

Theories of gravity with auxiliary fields are of particular interest since they are able to circumvent Lovelock’s theorem while avoiding the introduction of new degrees of freedom. This type of theories introduces derivatives of the stress-energy ten... Read More about Incompatibility of gravity theories with auxiliary fields with the standard model.