Pulsar Timing Array Explores Mystery Gravitational Waves From Supermassive Black Holes

Spiraling Supermassive Black Holes

A simulation of colliding supermassive binary black holes. Credit: NASA

Galaxies host supermassive black holes, which weigh millions to billions of times more than our Sun. When galaxies collide, pairs of supermassive black holes at their centers also lie on the collision course. It may take millions of years before two black holes slam into each other. When the distance between them is small enough, the North America and Europe. These collaborations, along with groups based in India, China, and South Africa, are actively combining datasets under the International Pulsar Timing Array, to improve the sky coverage.

​​This discovery is considered a precursor to the detection of gravitational waves from supermassive black holes. However, Dr. Goncharov and colleagues pointed out that the observed variations in the radio wave arrival times might also be due to DOI: 10.3847/2041-8213/ac17f4