Cocoons of debris surrounding collapsing stars may generate gravitational waves detectable by LIGO.
; they are ripples in spacetime generated by massive accelerating objects. The waves are also produced by the interactions of such objects, like binaries of and mergers between neutron stars and black holes., which is based in Louisiana and Washington. LIGO detects gravitational waves by measuring minuscule differences in the timing of laser pulses against mirrors in underground facilities; those differences suggest that ripples in spacetime slightly delayed the laser pulses.
Now, a team of researchers is suggesting that a new kind of wave from those yet detected could be rippling through the cosmos: gravitational waves produced by matter shed by dying stars. Their research was presented today at the 242nd meeting of the American Astronomical Society.
Scientists are searching for the gravitational wave background using pulsar timing arrays, which operate similarly to LIGO but rely on timing the detections of light emitted by rapidly spinning pulsars instead of subterranean laser pulses. A holy grail of gravitational wave astronomy would be a space-based observatory that would function the same way, but on a much larger scale than LIGO
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