97 citations · 568 across the 26 of their papers we have counts for
26 papers
Breakdown of Hydrodynamic Universality in Neutron Star Oscillations
Gabriel S. Denicol, Amanda Guerrieri, João V. M. Muniz +2
Hydrodynamic universality refers to the property that different formulations of relativistic dissipative hydrodynamics yield identical predictions in the asymptotic long-wavelength…
Radial Oscillations of Viscous Stars at Finite Temperature
Amanda Guerrieri, Gabriel S. Rocha, Gabriel S. Denicol +1
We study the radial oscillation spectrum of relativistic stars within Israel-Stewart and Navier-Stokes theories, extending previous analyses to include heat diffusion and a thermod…
Inspirals into bosonic dark matter stars and chirp mimickers
Caio F. B. Macedo, Haroldo C. D. Lima, Raissa F. P. Mendes +2
We investigate extreme--mass--ratio inspirals in which a stellar-mass compact object orbits a supermassive bosonic dark matter star, modeled as a boson star, using fully relativist…
Radial Oscillations of Viscous Neutron Stars: Zero Diffusion Case
Raissa F. P. Mendes, Amanda Guerrieri, João V. M. Muniz +2
The spectrum of radial oscillations of neutron stars is systematically studied within two frameworks of viscous relativistic hydrodynamics: the relativistic Navier-Stokes and Israe…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
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 ob…
On the phase transition mechanism of spontaneous scalarization
João Vitor M. Muniz, Néstor Ortiz, Raissa F. P. Mendes
In certain modified gravity theories that include additional scalar degrees of freedom, compact objects such as black holes and neutron stars may undergo a process known as spontan…
Effective-action model for dynamical scalarization beyond the adiabatic approximation
Mohammed Khalil, Raissa F. P. Mendes, Néstor Ortiz +1
In certain scalar-field extensions to general relativity, scalar charges can develop on compact objects in an inspiraling binary -- an effect known as dynamical scalarization. This…
Neutron stars in the symmetron model
Bernardo F. de Aguiar, Raissa F. P. Mendes, F. T. Falciano
Screening mechanisms are often deployed by dark energy models in order to conceal the effects of their new degrees of freedom from the scrutiny of terrestrial and solar system expe…
Equation-of-state-insensitive measure of neutron star stiffness
Jayana A. Saes, Raissa F. P. Mendes
Universal relations (i.e., insensitive to the equation of state) between macroscopic properties of neutron stars have proven useful for a variety of applications -- from providing…
Nonlinear dynamics of oscillating neutron stars in scalar-tensor gravity
Raissa F. P. Mendes, Néstor Ortiz, Nikolaos Stergioulas
The spectrum of oscillating compact objects can be considerably altered in alternative theories of gravity. In particular, it may be enriched by modes with no counterpart in genera…
Highly compact neutron stars and screening mechanisms. I. Equilibrium and stability
Bernardo F. de Aguiar, Raissa F. P. Mendes
Modified theories of gravity that offer viable models for dark energy often rely on mechanisms that screen their effects in high density environments. From this perspective, it wou…
Scalar charges and pulsar-timing observables in the presence of nonminimally coupled scalar fields
Raissa F. P. Mendes, Tulio Ottoni
Pulsar-timing has become a celebrated tool for probing modifications to General Relativity in the strong-field surroundings of neutron stars. Here we investigate whether scalar-ten…
Trace of the energy-momentum tensor and macroscopic properties of neutron stars
Dylan M. Podkowka, Raissa F. P. Mendes, Eric Poisson
A generic feature of scalar extensions of general relativity is the coupling of the scalar degrees of freedom to the trace of the energy-momentum tensor of matter fields. Inter…
Evolution of Highly Eccentric Binary Neutron Stars Including Tidal Effects
Huan Yang, William E. East, Vasileios Paschalidis +2
This work is the first in a series of studies aimed at understanding the dynamics of highly eccentric binary neutron stars, and constructing an appropriate gravitational-waveform m…
New class of quasinormal modes of neutron stars in scalar-tensor gravity
Raissa F. P. Mendes, Néstor Ortiz
Detection of the characteristic spectrum of pulsating neutron stars can be a powerful tool not only to probe the nuclear equation of state, but also to test modifications to genera…
Swimming in spacetime: the view from a Fermi observer
Raissa F. P. Mendes, Eric Poisson
An extended test body moving in a curved spacetime does not typically follow a geodesic, because of forces that arise from couplings between its multipole moments and the ambient c…
Tidal deformability of boson stars and dark matter clumps
Raissa F. P. Mendes, Huan Yang
In this work we consider minimally-coupled boson stars immersed in a tidal environment and compute their tidal deformability to leading order. We also describe an approximate corre…
Highly compact neutron stars in scalar-tensor theories of gravity: Spontaneous scalarization versus gravitational collapse
Raissa F. P. Mendes, Néstor Ortiz
Scalar-tensor theories of gravity are extensions of General Relativity (GR) including an extra, nonminimally coupled scalar degree of freedom. A wide class of these theories, albei…
Instability of nonminimally coupled scalar fields in the spacetime of thin charged shells
Jessica Santiago, Andre G. S. Landulfo, William C. C. Lima +3
We investigate the stability of a free scalar field nonminimally coupled to gravity under linear perturbations in the spacetime of a charged spherical shell. Our analysis is perfor…
Self-force and fluid resonances
Soichiro Isoyama, Raissa F. P. Mendes, Eric Poisson
The gravitational self-force acting on a particle orbiting a massive central body has thus far been computed for vacuum spacetimes involving a black hole. In this work we continue…
On the possibility of setting a new constraint to scalar-tensor theories
Raissa F. P. Mendes
Scalar-tensor theories (STTs) are a widely studied alternative to General Relativity (GR) in which gravity is endowed with an additional scalar degree of freedom. Although severely…
Instability of nonminimally coupled scalar fields in the spacetime of slowly rotating compact objects
Raissa F. P. Mendes, George E. A. Matsas, Daniel A. T. Vanzella
Nonminimally coupled free scalar fields may be unstable in the spacetime of compact objects. Such instability can be triggered by classical seeds or, more simply, by quantum fluctu…
Reply to "Comment on `Quantum versus classical instability of scalar fields in curved backgrounds'"
George E. A. Matsas, Raissa F. P. Mendes, Daniel A. T. Vanzella
We show that the reasoning which led the author of arXiv:1310.6252 to reach his conclusions relies on an incorrect criterion for the existence of normalizable bound solutions. We r…
Quantum versus classical instability of scalar fields in curved backgrounds
Raissa F. P. Mendes, George E. A. Matsas, Daniel A. T. Vanzella
General-relativistic stable spacetimes can be made unstable under the presence of certain nonminimally coupled free scalar fields. In this paper, we analyze the evolution of linear…