منابع مشابه
New Limits on Gravitational Radiation using Pulsars
We calculate a new gravitational wave background limit using timing residuals from PSRs J1713+0747, B1855+09, and B1937+21. The new limit is based on 17 years of continuous data pieced together from 3 different observing projects: 2 at the Arecibo Observatory and 1 at the 140ft Green Bank Telescope. This project represents the earliest results from the ‘Pulsar Timing Array’ which will soon be a...
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متن کاملConstraining the New Aether : Gravitational Cherenkov Radiation
We study the simplest concrete theory for spontaneous Lorentz violation , the " New Aether Theory " of Jacobson and Mattingly, which is a vector-tensor gravitational theory with a fixed-modulus condition on the vector field. We show that the observation of ultra-high energy cosmic rays (which implies the absence of energy loss via various Cherenkov type processes) places constraints on the para...
متن کاملGravitational Radiation *
Gravity is one of the fundamental forces of Nature, and it is the dominant force in most astronomical systems. In common with all other phenomena, gravity must obey the principles of Special Relativity. In particular, gravitational forces must not be transmitted or communicated faster than light. This means that when the gravitational field of an object changes, the changes ripple outwards thro...
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We show that if the visible universe is a membrane embedded in a higher-dimensional space, particles in uniform motion radiate gravitational waves because of spacetime lumpiness. This phenomenon is analogous to the electromagnetic diffraction radiation of a charge moving near to a metallic grating. In the gravitational case, the role of the metallic grating is played by the inhomogeneities of t...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1973
ISSN: 0031-9007
DOI: 10.1103/physrevlett.31.779