Astronomers Detect Biggest Collision of Impossible Black Holes

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Astronomers Detect Biggest Collision of Impossible Black Holes

  • On May 21,2019 a short gravitational wave signal came from two gigantic black holes weighing at least 85 and 66 times of the mass of the sun.
  • Recently, the astronomers declared it the biggest collision ever detected that led to the formation of a black hole 150 times the mass of the sun.
Astronomers Detect Biggest Collision

Overview

  • The collision was observed by LIGO (Laser Interferometer Gravitational Wave Observatory) .
  • LIGO is the world՚s largest gravitational wave observatory, and the European based Virgo detector and VIRGO scientific collaboration.
  • The scientists from the Centre for Gravitational Astrophysics at The Australian National University (ANU) were included.
  • As per the astronomers, any black hole 65 - 130 the mass of the sun is ‘impossible’ to exist.
  • Any star big enough to create such a massive black hole should destroy itself upon collapse via a process called pair instability.
  • Black holes are like vacuum cleaners of the universe.
  • They suck in everything in their paths including gas clouds and stars.
  • Black holes also suck in other black holes, which makes it possible to produce bigger and bigger black holes by the ongoing collisions of earlier generations of black holes.
  • Astronomers believe black hole in the detected collision may have been produced in this way.
  • Black holes which are 100 - 100,000 times the mass of the sun is called intermediate mass black holes (IMBHs) .
  • There have been no conclusive electromagnetic observations for IMBHs in the range 100 - 1,000 solar masses.
  • Analyzing gravitational wave signal detected, it was suggested that the two black holes merged when the universe was seven billion years old, which is about half its current age.
  • The signal lasted only one-tenth of a second, but is the most distant gravitational wave signal detected so far.

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