Atomic Hydrogen and GMRT

Why in news? The Giant Metrewave Radio Telescope (GMRT) which is located in India’s Pune, has detected a radio signal originating from an extremely distant galaxy.

About:

Atomic hydrogen is the basic fuel required for star formation in a galaxy.
When hot ionized gas from the surrounding medium of a galaxy falls onto the universe, the gas cools and forms atomic hydrogen.
This atomic hydrogen then becomes molecular hydrogen and eventually leads to the formation of stars.
Atomic hydrogen emits radio waves of 21 cm wavelength, which helps in the direct tracing of the atomic gas content in nearby and distant galaxies.

Giant Metrewave Radio Telescope (GMRT)

It is a low-frequency radio telescope that helps investigate various radio astrophysical problems ranging from nearby solar systems to the edge of the observable universe.
It is operated by the National Centre for Radio Astrophysics (NCRA), a part of the Tata Institute of Fundamental Research, Mumbai.

https://www.wionews.com/science/india-based-telescope-detects-faint-radio-signal-from-an-extremely-distant-galaxy-553716/amp

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