Astronomy | Sebastian Spicker

2023

1 article

7 Jul 2023 The Milky Way Is a Gravitational Wave Detector LIGO uses 4-kilometre laser arms to detect gravitational waves at hundreds of hertz. Pulsar timing arrays use millisecond pulsars scattered across the Milky Way — arms measured in light-years — to detect gravitational waves at nanohertz frequencies, ten orders of magnitude lower. In June 2023, four collaboration papers reported evidence for a stochastic gravitational wave background. The Milky Way itself was the detector. gravitational-wavesastronomypulsars