Gravitational waves as deformations of embedded Einstein spaces

Details Gravitational waves as deformations of embedded Einstein spaces Gravitational waves as deformations of embedded Einstein spaces

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009cqgra..26w5007k&link_type=abstract

Classical and Quantum Gravity, Volume 26, Issue 23, pp. 235007 (2009).

Physics

Scientific paper

We show how approximate radiative solutions of Einstein's equations can be constructed using small deformations of Einstein spacetimes embedded into a pseudo-Euclidean flat space of higher dimension. Infinitesimal deformations are seen then as vector fields in EN. All geometrical quantities can be then expressed in terms of embedding functions zA and their deformations v^A, z^A \rightarrow {\tilde{z}}^A = z^A + \varepsilon \, v^A + \varepsilon ^2 \, w^A +\cdots . Then we require the deformations to keep Einstein equations satisfied up to a given order in ɛ. The system obtained is then analyzed in particular cases of the Minkowski and Schwarzschild manifolds taken as a starting point, and solutions of deformations of Einstein's equations displaying radiative behavior are found up to the third order of expansion in small parameter ɛ.

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