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77 papers · 1 filter
A mechanism to derive multi-power law functions: an application in the econophysics framework
A. M. Scarfone
It is generally recognized that economical systems, and more in general complex systems, are characterized by power law distributions. Sometime, these distributions show a changing…
How far away is far enough for extracting numerical waveforms, and how much do they depend on the extraction method?
Enrique Pazos, Ernst Nils Dorband, Alessandro Nagar +3
We present a method for extracting gravitational waves from numerical spacetimes which generalizes and refines one of the standard methods based on the Regge--Wheeler--Zerilli pert…
Increasing efficiency through optimal RK time integration of diffusion equations
Fausto Cavalli, Giovanni Naldi, Gabriella Puppo +1
The application of Runge-Kutta schemes designed to enjoy a large region of absolute stability can significantly increase the efficiency of numerical methods for PDEs based on a met…
A comparison between relaxation and Kurganov-Tadmor schemes
Fausto Cavalli, Giovanni Naldi, Gabriella Puppo +1
In this work we compare two semidiscrete schemes for the solution of hyperbolic conservation laws, namely the relaxation and the Kurganov Tadmor central scheme. We are particularly…
Binary black hole merger in the extreme mass ratio limit
Alessandro Nagar, Thibault Damour, Angelo Tartaglia
We discuss the transition from quasi-circular inspiral to plunge of a system of two nonrotating black holes of masses and in the extreme mass ratio limit $m_1m_2\ll (m_…
Constraining models of modified gravity with the double pulsar PSR J0737-3039A/B system
Lorenzo Iorio, Matteo Luca Ruggiero
In this paper we use Delta P = -1.772341 +/- 13.153788 s between the phenomenologically determined orbital period P_b of the PSR J0737-3039 double pulsar system and the purely Kepl…