GW231123

GW231123 : Recently, an international team of astrophysicists announced the discovery of an exceptionally rare black hole merger, identified as GW231123.

• About Black Hole Merger : Occurs when two black holes, incredibly dense regions with gravity so strong that not even light can escape, come close and begin orbiting each other.

o As they orbit, they emit gravitational waves, ripples in spacetime predicted by Einstein’s theory of general relativity, causing them to lose energy and gradually move closer.

o Eventually, their orbits decay, leading to a final collision where they merge into a single, more massive black hole.

o This powerful event releases a burst of gravitational waves, detectable by observatories like LIGO (USA), Virgo (Italy), and KAGRA (Japan).

• About GW231123: Two black holes — one around 137 times and the other 103 times the mass of the Sun — merged to form a supermassive black hole.

o The combined mass falls in the "mass gap" (100–150 solar masses), where existing models predict very few black holes should exist.

o Both black holes were observed to be spinning at extremely high speeds, challenging current theories of black hole formation and angular momentum.

• About Black Holes : Are extremely dense cosmic objects with gravitational forces so intense that not even light can escape. The existence of black holes was first predicted by Albert Einstein in 1916 through his general theory of relativity.

o Black holes grow by accreting nearby matter, pulling in stars, gas, and dust through their intense gravitational field.

o The central point of infinite density where the black hole’s entire mass is concentrated.