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Multipole expansions for energy and momenta carried by gravitational waves
Milton Ruiz, Miguel Alcubierre, Dario Nunez +1
We present expressions for the energy, linear momentum and angular momentum carried away from an isolated system by gravitational radiation based on spin-weighted spherical harmoni…
Outer boundary conditions for Einstein's field equations in harmonic coordinates
Milton Ruiz, Oliver Rinne, Olivier Sarbach
We analyze Einstein's vacuum field equations in generalized harmonic coordinates on a compact spatial domain with boundaries. We specify a class of boundary conditions which is con…
Regularization of spherical and axisymmetric evolution codes in numerical relativity
Milton Ruiz, Miguel Alcubierre, Dario Nunez
Several interesting astrophysical phenomena are symmetric with respect to the rotation axis, like the head-on collision of compact bodies, the collapse and/or accretion of fields w…