First Evidence Of Gravitational Waves At Very Low Frequencies Hum Linked To Cosmic Clocks Pulsars Supermassive Black Hole Binary NANOGrav

In a breakthrough, scientists have found the first evidence of gravitational waves at very low frequencies. In a black hole binary, the two black holes orbit each other, and produce low-frequency gravitational waves. Professor Lam told ABP Live that supermassive black hole binaries are the most probable cause behind these very low-frequency gravitational waves because a supermassive black hole is present at the centre of every major galaxy in the universe, and galaxies merge. Professor Lam explained that based on what scientists know about the universe, supermassive black hole binaries are the most likely candidate for the source of gravitational waves, but there is not much statistical evidence to say what the sources are. NANOGrav hopes that in the future, the collaboration will be able to detect gravitational waves emitted by relatively nearby, individual supermassive black hole binaries.