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Radio signal originating from atomic hydrogen

January 26 , 2023 427 days 369 0
  • Recently, a radio signal originating from atomic hydrogen in an extremely distant galaxy was detected by the Giant Metrewave Radio Telescope (GMRT).
  • Atomic hydrogen is the basic fuel required for star formation in a galaxy.
  • Atomic hydrogen emits radio waves of 21 cm wavelength.
  • The wavelength is a direct tracer of the atomic gas content in nearby and distant galaxies.
  • The signal detected by the team was emitted from this galaxy when the universe was only 4.9 billion years old.
  • Redshift represents the signal’s wavelength change depending on the object’s location and movement; a greater value of z indicates a farther object.

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