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Gravitational Cherenkov Radiation from Extended Theories of Gravity

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arxiv 1206.6681 v1 pith:NACAUPCG submitted 2012-06-28 gr-qc astro-ph.HEhep-th

M. De Laurentis , S. Capozziello , G. Basini This is my paper · ORCID
classification gr-qcastro-ph.HEhep-th
keywords cherenkovfieldgravitationalgravitymodesradiationscalarspin-2
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We linearize the field equations for higher order theories of gravity that contain scalar invariants other than the Ricci scalar. We find that besides a massless spin-2 field (the standard graviton), the theory contains also spin-0 and spin-2 massive modes with the latter being, in general, ghost modes. The rate at which such particles would emit gravitational Cherenkov radiation is calculated for some interesting physical cases.

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