Number of Giant Radio Galaxies

  • IASbaba
  • September 17, 2020
  • 0
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Number of Giant Radio Galaxies

Part of: GS Prelims and GS-III – Space

In news

  • Indian Researchers working on giant radio galaxies (GRG) at Inter-University Centre for Astronomy and Astrophysics (IUCAA) Pune, India and Leiden University, Netherlands, have found nearly 400 new GRGs.

Important value additions

Giant Radio Galaxies (GRG)

  • GRGs are large single structures in the universe.
  • When some of the radio galaxies grow to enormous sizes, bigger than 33 lakh light years across, they are called giant radio galaxies (GRGs).
  • GRGs were discovered in 1974 and until 2016, only about 300 GRGs were known.
  • The latest findings indicate that they are over 800.
  • It is not clearly understood how some objects grow to such large scales and what is the fuel of their respective black holes.
  • The study of GRGs gives important clues to unveiling how massive black holes accrete mass and the efficiency with which they produce the magnificent jets.

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