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Nonlocal Gravity$
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Bahram Mashhoon

Print publication date: 2017

Print ISBN-13: 9780198803805

Published to Oxford Scholarship Online: July 2017

DOI: 10.1093/oso/9780198803805.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 19 September 2021

Linearized Gravitational Waves in Nonlocal Gravity

Linearized Gravitational Waves in Nonlocal Gravity

(p.187) 9 Linearized Gravitational Waves in Nonlocal Gravity
Nonlocal Gravity

Bahram Mashhoon

Oxford University Press

Gravitational radiation is investigated within the framework of linearized nonlocal gravity. In this theory, linearized gravitational waves are damped as they travel from the source to the receiver. This gravitational memory drag leads to the exponential decay of the wave amplitude. The damping effect could be significant for waves with very long wavelegths comparable to galactic distances. More generally, for gravitational waves with wavelengths comparable to the basic nonlocality lengthscale of order 1 kpc, the nonlocal deviations from general relativity can be significant. However, gravitational waves of current observational interest have wavelengths that are very small in comparison with 1 kpc; in this case, the nonlocal deviations from general relativity essentially average out and can be safely neglected in practice.

Keywords:   linearized nonlocal gravity, gravitational radiation, linearized gravitational wave, gravitational memory drag, damping

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