Geodesic
Bounds on the Bondi energy by a flux of curvature
Journal of the European Mathematical Society, Tome 18 (2016) no. 9, pp. 2045-2106

Voir la notice de l'article provenant de la source EMS Press

We consider smooth null cones in a vacuum spacetime that extend to future null infinity. For such cones that are perturbations of shear-free outgoing null cones in Schwarzschild spacetimes, we prove bounds for the Bondi energy, momentum, and rate of energy loss. The bounds depend on the closeness between the given cone and a corresponding cone in a Schwarzschild spacetime, measured purely in terms of the differences between certain weighted L2-norms of the spacetime curvature on the cones, and of the geometries of the spheres from which they emanate. This paper relies on the results in [1], which uniformly control the geometry of the given null cone up to infinity, as well as those of [18], which establish machinery for dealing with low regularities. A key step in this paper is the construction of a family of asymptotically round cuts of our cone, relative to which the Bondi energy is measured.
DOI : 10.4171/jems/638
Classification : 83-XX, 35-XX, 53-XX
Keywords: Bondi, mass, energy, angular, momentum, curvature, flux, asymptotic, round, uniformization 
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     author = {Spyros Alexakis and Arick Shao},
     title = {Bounds on the {Bondi} energy by a flux of curvature},
     journal = {Journal of the European Mathematical Society},
     pages = {2045--2106},
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     year = {2016},
     doi = {10.4171/jems/638},
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Spyros Alexakis; Arick Shao. Bounds on the Bondi energy by a flux of curvature. Journal of the European Mathematical Society, Tome 18 (2016) no. 9, pp. 2045-2106. doi: 10.4171/jems/638

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