The gravitational wave background (also GWB and stochastic background) is a random background of gravitational waves permeating the Universe, which is detectable by gravitational-wave experiments, like pulsar timing arrays. [1]

Einstein’s theory of general relativity predicts that a background of gravitational waves should imprint a distinctive pattern of correlated timing variations on pulsars, indicated by the black dashed line.

2023年6月28日 · A quintet of new studies offers the first direct evidence of a gravitational wave background, confirming standard models of black hole growth.

2023年6月28日 · NANOGrav was able to measure the background gravitational waves, thanks to the presence of millisecond pulsars — rapidly rotating neutron stars that sweep a bright beam of radio waves past Earth several hundred times per second.

2023年6月29日 · For nearly a decade, scientists have been hunting for the gravitational wave background, a faint but persistent echo of gravitational waves thought to have been set off by events that took...

2023年6月29日 · When black holes and other enormously massive, dense objects whirl around one another, they send out ripples in space and time called gravitational waves. These waves are one of the few ways we...

2023年6月29日 · Scientists from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) have officially made the first detections of the gravitational wave background.

2024年3月11日 · In 2023, pulsar timing arrays announced what could become the first ever discovery of a stochastic gravitational wave background: the random superposition of gravitational waves permeating...

2023年6月28日 · A quintet of new studies offers the first direct evidence of a gravitational wave background, confirming standard models of black hole growth.

2024年12月4日 · In the 2023 results, NANOGrav found evidence of cosmic gravitational waves but didn’t have enough data to pin down the source. But even this was a tremendous result.