32 citations · 116 across the 14 of their papers we have counts for
14 papers
Orbital evolution of asymmetric binaries within accreting environments
Albert Radulea, Marcelo E. Rubio, Konstantinos Kritos +1
Extreme mass-ratio inspirals embedded in accretion disks provide a natural arena for studying the interplay between relativistic orbital dynamics and environmental effects. In this…
Constraint evolution in first-order viscous relativistic fluids
Delfina Fantini, Marcelo E. Rubio
Relativistic hydrodynamics provides a solid framework for evolving matter and energy in a wide variety of phenomena. Nevertheless, the inclusion of dissipative effects in realistic…
Bekenstein bounds in maximally symmetric nonlinear electrodynamics
Juan Manuel Diaz, Marcelo E. Rubio
We explore dynamical features of the maximally symmetric nonlinear extension of classical electromagnetism, recently proposed in the literature as ``ModMax'' electrodynamics. This…
Fixing the dynamical evolution of self-interacting vector fields
Marcelo E. Rubio, Guillermo Lara, Miguel Bezares +2
Numerical simulations of the Cauchy problem for self-interacting massive vector fields often face instabilities and apparent pathologies. We explicitly demonstrate that these issue…
Well-posed evolution of field theories with anisotropic scaling: the Lifshitz scalar field in a black hole space-time
Marcelo E. Rubio, Áron D. Kovács, M. Herrero-Valea +2
Partial differential equations exhibiting an anisotropic scaling between space and time -- such as those of Horava-Lifshitz gravity -- have a dispersive nature. They contain higher…
Numerical simulations of divergence-type theories for conformal dissipative fluids
Pablo Montes, Marcelo E. Rubio, Oscar A. Reula
We present the first numerical simulations of the symmetric--hyperbolic theory for conformal dissipative relativistic fluids developed in [1]. In this theory, the information of th…
Isotropization of a rotating and longitudinally expanding scalar system
Margaret E. Carrington, Gabor Kunstatter, Christopher Phillips +1
We present numerical simulations for the evolution of an expanding system of massless scalar fields with quartic coupling. By setting a rotating, non-isotropic initial configuratio…
Extended primordial black hole mass functions with a spike
Juan Magaña, Marco San Martín, Joaquín Sureda +3
We introduce a modification of the Press-Schechter formalism aimed to derive general mass functions for primordial black holes (PBHs). In this case, we start from primordial power…
Dark matter from primordial black holes would hold charge
Ignacio J. Araya, Nelson D. Padilla, Marcelo E. Rubio +3
We explore the possibility that primordial black holes (PBHs) contain electric charge down to the present day. We find that PBHs should hold a non-zero net charge at their formatio…
Magnetic field generation from primordial black hole distributions
Ignacio J. Araya, Marcelo E. Rubio, Marco San Martin +4
We introduce a statistical method for estimating magnetic field fluctuations generated from primordial black hole (PBH) populations. To that end, we consider monochromatic and exte…
Ill-posedness of the mean-field dynamo equations with a linear electromotive force
Marcelo E. Rubio, Federico A. Stasyszyn
We show that the initial-value problem for the non-relativistic magnetic dynamo equation turns out to be ill-posed when the electromotive force depends linearly on the magnetic fie…
Generic instabilities in the relativistic Chapman-Enskog heat conduction law
A. L. Garcia-Perciante, Marcelo E. Rubio, Oscar A. Reula
We address the well-posedness of the Cauchy problem corresponding to the relativistic fluid equations, when coupled with the heat-flux constitutive relation arising within the rela…
A hyperbolic theory of relativistic conformal dissipative fluids
Luis Lehner, Oscar A. Reula, Marcelo E. Rubio
We develop a complete description of the class of conformal relativistic dissipative fluids of divergence form, following the formalism carried out by Geroch, Lindblom and Pennisi.…
On the ill posedness of Force-Free Electrodynamics in Euler Potentials
Oscar A. Reula, Marcelo E. Rubio
We prove that the initial value problem for Force-free Electrodynamics in Euler variables is not well posed. We establish this result by showing that a well-posedness criterion pro…