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gr-qc2024
Probing the speed of scalar-induced gravitational waves with pulsar timing arrays
Zu-Cheng Chen, Jun Li, Lang Liu +1
Recently, several regional pulsar timing array collaborations, including CPTA, EPTA, PPTA, and NANOGrav, have individually reported compelling evidence for a stochastic signal at n…
gr-qc2023
Measuring the speed of scalar induced gravitational waves from observations
Jun Li, Guang-Hai Guo
We investigate the scalar induced gravitational waves which propagate with a speed different from the speed of light. First, we analytically calculate the expression of the power s…