Gravitational Radiation
See 'gravitational waves'.
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GRAVITATIONAL RADIATION - Very weak wave-like disturbances in the geometry of space and time produced by an accelerating, oscillating or violently disturbed mass, or system of masses.
GRAVITATIONAL RADIATION
When an object which has mass is accelerated or otherwise disturbed, it is predicted to radiate gravitational waves.
GREAT RED SPOT ...
gravitational radiation: As predicted by general relativity, expanding waves in a gravitational field that transport energy through space.
Gravitational Radiation
(a) Propagating waves of gravitational tidal force that are emitted by dynamical systems such as collapsing stars or binary star systems, and move with the speed of light.
Gravitational Radiation: The theory of general relativity predicts that if one changes the distributions of masses (which generate gravitational fields) in certain ways one can get propagating waves of gravity in a manner analogous to the propagating ...
The gravitational radiation associated with this system comes from the time dependent nature of spacetime outside the black holes as these objects move towards each other and accelerate.
Although gravitational radiation has not yet been directly detected, it has been indirectly shown to exist. This was the basis for the 1993 Nobel Prize in Physics, awarded for measurements of the Hulse-Taylor binary system.
The existence of gravitational radiation, with the features described above, is predicted by the physical theory of general relativity, which describes gravitation in general. The equations of this theory are nonlinear, so that: ...
emitting even more gravitational radiation. This runaway situation can lead to the decay and eventual merger of close binary systems in a relatively short time (which, in this case, means tens or hundreds of millions of years).
There are, however, some indirect pieces of evidence that accelerated astronomical masses do emit gravitational radiation. The most convincing concerns radio-timing observations of a pulsar located in a binary star system with an orbital period of 7.
He was one of the first to correctly appreciate the nature of gravitational radiation, introducing Bondi radiation coordinates, the Bondi k-calculus, and the notion of Bondi mass, and writing influential review articles.
Bildsten said that accreting millisecond pulsars could eventually be studied in greater detail in an entirely new way, through the direct detection of their gravitational radiation.
Relativity predicts that over time a binary system's orbital energy will be converted to gravitational radiation.
The reducing orbital period represents a loss of energy, which can only be accounted for by gravitational radiation.
On the longest timescales (1020 years and longer), gravitational radiation will turn galaxies into massive black holes plus escaped individual stars, if protons don't decay first (Dyson 1979 Rev. Mod. Phys.
gravitational wave The gravitational analog of an electromagnetic wave whereby gravitational radiation is emitted at the speed of light from any mass that undergoes rapid acceleration.
Kip S. Thorne
1940-
American
contributed to the theoretical understanding of black holes and gravitational radiation; co-founded the Laser Interferometer Gravitational Wave Observatory Project (LIGO) ...
It is found that the rate of period change (about 75 millionths of a second each year) is what would be expected for energy being lost to gravitational radiation, as predicted by the Theory of General Relativity.
[A84]
Relativistic Bremsstrahlung
Hypothetical gravitational radiation emitted when two stars fly past each other with high velocity and deflect each other slightly. [H76]
Relativistic Cosmology ...
black hole and the galaxy it lives in," says Hodges-Kluck. "If even a fraction of X-shaped radio galaxies are produced by such "spin-flips", then their frequency may be important for estimating the detection rates with gravitational radiation ...
4 hours and the two stars will merge in 85 Myr due to gravitational radiation.
As of April 2006 there has been no test by which an observer could tell acceleration from gravitation, nor has gravitational radiation been directly observed. Some of these subjects are explored in Chapter 8.
 See also: Gravitation, Mass, Time, General Relativity, Energy
  
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