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Radio signal originating from atomic hydrogen
January 26 , 2023
672 days
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- 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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