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alantheastronomer
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Gravitational waves are quadrupoles, they bend and stretch spacetime. Does the expansion of spacetime due to gravitational waves exceed flat (Minkowski) spacetime or is flat spacetime it's limit?
alantheastronomer said:Does the perturbation "stretch" spacetime beyond asymptotic flatness? ...Causing an expansion?
pervect said:I believe the expansion scalar for this wave is zero
pervect said:a vacuum space-time with GW's can have a non-zero ADM mass due to the presence of the GW's
alantheastronomer said:Does the perturbation "stretch" spacetime beyond asymptotic flatness? ...Causing an expansion?
Gravitational waves are ripples in the fabric of spacetime caused by the acceleration of massive objects. They were first predicted by Albert Einstein's theory of general relativity and were recently detected by scientists.
When two massive objects orbit each other, they create ripples in the fabric of spacetime. These ripples, known as gravitational waves, carry energy and momentum away from the system, causing the objects to gradually move closer together. This results in the expansion of spacetime.
Yes, gravitational waves can be detected using highly sensitive instruments called interferometers. These devices measure tiny changes in the length of space caused by passing gravitational waves.
The detection of gravitational waves provides strong evidence for the theory of general relativity and expands our understanding of the universe. It also opens up new possibilities for studying astrophysical phenomena, such as black holes and the early universe.
Gravitational waves can help us understand the expansion of the universe by providing insight into the rate of expansion and the presence of dark energy. They can also help us study the history of the universe and its evolution over time.