holes

Colliding black holes could be hiding in the light of superluminous quasars

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Collisions between stellar-mass black holes can occur in the violent environments created around their larger, feeding counterparts, according to a new study. Supermassive black holes, found at the heart of most, if not all, galaxies can reach masses millions or even billions of times greater than the sun. Some of them are surrounded by disks … Read more

Did the Pulsar Timing Array actually detect colliding primordial black holes?

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Universe Today

The universe is filled with gravitational waves. We know this thanks to the North American Nanohertz Observatory for Gravitational Waves (NANOGrav), which recently announced the first observations of long-wavelength gravitational waves rippling through the Milky Way. The waves are likely caused by supermassive black hole mergers, but can we prove it? Most of the gravitational … Read more