2011/01/31 by Nicolas Yunes, Leo C. Stein · 1 citation
Physics and Astronomy · #gr-qc #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.83.104002
published as Phys.Rev.D83:104002,2011 · 7 pages, submitted to PRD
arxiv created 2011/03/08 · arxiv updated 2011/05/12
We study two large classes of alternative theories, modifying the action through algebraic, quadratic curvature invariants coupled to scalar fields. We find one class that admits solutions that solve the vacuum Einstein equations and another that does not. In the latter, we find a deformation to the Schwarzschild metric that solves the modified field equations in the small coupling approximation. We calculate the event horizon shift, the innermost stable circular orbit shift, and corrections to gravitational waves, mapping them to the parametrized post-Einsteinian framework.