Estimating total momentum at finite distances

Emanuel Gallo, Luis Lehner, and Osvaldo M. Moreschi
Phys. Rev. D 78, 084027 – Published 22 October 2008

Abstract

We study the difficulties associated with the evaluation of the total Bondi momentum at finite distances around the central source of a general (asymptotically flat) spacetime. Since the total momentum is only rigorously defined at future null infinity, both finite distance and gauge effects must be taken into account for a correct computation of this quantity. Our discussion is applicable in general contexts but is particularly relevant in numerically constructed spacetimes for both extracting important physical information and assessing the accuracy of additional quantities.

  • Figure
  • Received 27 June 2008

DOI:https://doi.org/10.1103/PhysRevD.78.084027

©2008 American Physical Society

Authors & Affiliations

Emanuel Gallo1,*, Luis Lehner2,†, and Osvaldo M. Moreschi1,‡

  • 1FaMAF Universidad Nacional de Córdoba, Ciudad Universitaria, (5000) Córdoba, Argentina
  • 2Department of Physics and Astronomy, LSU, Baton Rouge, Louisiana 70803, USA

  • *egallo@famaf.unc.edu.ar
  • lehner@phys.lsu.edu
  • moreschi@fis.uncor.edu

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Issue

Vol. 78, Iss. 8 — 15 October 2008

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