Ramiro Cayuso
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View article: The Science of the Einstein Telescope
The Science of the Einstein Telescope Open
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science objectives, providing state-of-the-art predictions for the ca…
View article: Scalar emission from neutron star-black hole binaries in scalar-tensor theories with kinetic screening
Scalar emission from neutron star-black hole binaries in scalar-tensor theories with kinetic screening Open
We explore scalar radiation from neutron star-black hole binaries in scalar-tensor theories with kinetic screening ($K$-essence). Using 3+1 numerical relativity simulations in the decoupling limit, we investigate scalar dipole and quadrupo…
View article: Deep Learning solutions to singular ordinary differential equations: from special functions to spherical accretion
Deep Learning solutions to singular ordinary differential equations: from special functions to spherical accretion Open
Singular regular points often arise in differential equations describing physical phenomena such as fluid dynamics, electromagnetism, and gravitation. Traditional numerical techniques often fail or become unstable near these points, requir…
View article: Self-Consistent Modeling of Gravitational Theories beyond General Relativity
Self-Consistent Modeling of Gravitational Theories beyond General Relativity Open
The majority of extensions to general relativity (GR) display mathematical pathologies-higher derivatives, character change in equations that can be classified within partial differential equation theory, and even unclassifiable ones-that …
View article: Gravitational collapse in Quadratic Gravity
Gravitational collapse in Quadratic Gravity Open
This study explores the gravitational collapse of a massless scalar field within Quadratic Gravity treated as a dimension-four operator Effective Field Theory extension to General Relativity. The additional degrees of freedom associated wi…
View article: Modelling self-consistently beyond General Relativity
Modelling self-consistently beyond General Relativity Open
The majority of extensions to General Relativity display mathematical pathologies (higher derivatives, character change in equations that can be classified within PDE theory, and even unclassifiable ones) that cause severe difficulties to …
View article: Nonlinear, noniterative treatment of EFT-motivated gravity
Nonlinear, noniterative treatment of EFT-motivated gravity Open
We study a higher derivative extension to General Relativity and present a\nfully nonlinear/non-perturbative treatment to construct initial data and study\nits dynamical behavior in spherical symmetry when coupled to a massless scalar\nfie…
View article: Massive vector fields in Kerr-Newman and Kerr-Sen black hole spacetimes
Massive vector fields in Kerr-Newman and Kerr-Sen black hole spacetimes Open
View article: Astrophysical jets from boosted compact objects
Astrophysical jets from boosted compact objects Open
We perform full 3D numerical simulations of compact objects, such as black\nholes or neutron stars, boosted through an ambient force-free plasma that\nposses a uniform magnetization. We study jet formation and energy extraction\nfrom the r…
View article: Principal tensor strikes again: Separability of vector equations with torsion
Principal tensor strikes again: Separability of vector equations with torsion Open