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8 papers · 2 filters
Robustness of a high-resolution central scheme for hydrodynamic simulations in full general relativity
Masaru Shibata, José A. Font
A recent paper by Lucas-Serrano et al. indicates that a high-resolution central (HRC) scheme is robust enough to yield accurate hydrodynamical simulations of special relativistic f…
Gravitational waves from oscillating accretion tori: Comparison between different approaches
Alessandro Nagar, Jose A. Font, Olindo Zanotti +1
Quasi-periodic oscillations of high density thick accretion disks orbiting a Schwarzschild black hole have been recently addressed as interesting sources of gravitational waves. Th…
Post-Newtonian constraints on f(R) cosmologies in Palatini formalism
Gonzalo J. Olmo
We compute the complete post-Newtonian limit of the Palatini form of f(R) gravities using a scalar-tensor representation. By comparing the predictions of these theories with labora…
Post-Newtonian constraints on f(R) cosmologies in metric formalism
Gonzalo J. Olmo
We compute the complete post-Newtonian limit of the metric form of f(R) gravities using a scalar-tensor representation. By comparing the predictions of these theories with laborato…
The gravity lagrangian according to solar system experiments
Gonzalo J. Olmo
In this work we show that the gravity lagrangian f(R) at relatively low curvatures in both metric and Palatini formalisms is a bounded function that can only depart from the linear…
Einstein-Planck Formula, Equivalence Principle and Black Hole Radiance
Alessandro Fabbri, Jose Navarro-Salas
The presence of gravity implies corrections to the Einstein-Planck formula . This gives hope that the divergent blueshift in frequency, associated to the presence of a black…