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Speaker |
Bentivegna, Eloisa |
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Co-autors |
E. Schnetter, B. Krishnan |
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Talk Title |
Constant-expansion surfaces for finite-distance extraction of observables in Numerical Relativity |
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Abstract |
In General Relativity, the estimate of angular momentum and other physical observables is complicated by a number of factors, such as their non-localizability and the ambiguities in defining a reference frame in which to measure them. Most of these issues seriously affect numerical simulations, where only portions of a spacetime are usually accessible, and one has very little control over the coordinates used and their evolution. I will discuss how surfaces of constant expansion show the potential to resolve the ambiguities and alleviate these problems. |
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