Astronomers captured a radio signal from the most distant galaxy

Probing galaxies at much greater distances from Earth may now be within reach.

JANUARY 23, 2023 14:23 IST

BY
AMIT MALEWAR



Illustration showing detection of the lensed 21 cm atomic hydrogen emission signal from a distant galaxy. Credit: Swadha Pardesi

Detecting radio signals emitted by nearby galaxies could help astronomers answer how stars form in distant galaxies. Until now, it’s only been possible to capture this particular signal from a galaxy nearby, limiting our knowledge to those galaxies closer to Earth. However, these signals become weaker the further away a galaxy is from Earth, making it difficult for current radio telescopes to pick up.

Thanks to gravitational lensing, astronomers from Montreal and India have captured a radio signal from the most distant galaxy. Astronomers captured a faint signal from a record-breaking distance- so far at a specific wavelength known as the 21 cm line.

For this discovery, astronomers used the Giant Metrewave Radio Telescope in India. This is the first time this radio signal has been detected at such a large distance, allowing astronomers to explore the secrets of the early universe.

The signal was found to come from a distant star-forming galaxy known as SDSSJ0826+5630, which exists 8.8 billion light-years away. This distance indicates that the galaxy is closer to the Big Bang.

More:
https://www.techexplorist.com/astronomers-captured-radio-signal-distant-galaxy/56329/

~ ~ ~



GIANT METREWAVE RADIO TELESCOPE (GMRT)
Aug. 10, 2018
Astronomers from various countries have discovered the most distant radio galaxy ever known by using data from Giant Metrewave Radio Telescope (GMRT) in Pune.

More:
https://vajiramias.com/current-affairs/giant-metrewave-radio-telescope-gmrt/5c15f2852099372ce5792ebe/

~ ~ ~



Giant Metrewave Radio Telescope (GMRT) has become the third scientific facility from India to receive the Institute of Electrical and Electronics Engineers (IEEE) milestone. Know all the details of GMRT, IEEE, its significance and details here

TULIKA TANDON
UPDATED: DEC 3, 2020 11:53 IST

. . .

What is GMRT
GMRT is an array of 30 antennas that are positioned in a ‘Y’ shape, at Khodad village in Junnar taluka of Pune district. It is operated by the TIFR – National Centre for Radio Astrophysics, NCRA. Late Govind Swarup came up with the idea of GMRT.

It is extensively used for studying the universe in low frequency since 2000. The telescope has been useful in various path-breaking discoveries. Scientists from almost 40 countries use the data generated from this telescope. Recently, the facility underwent its first upgrade, thereby allowing researchers to dig deeper into the universe.

More:
https://www.jagranjosh.com/general-knowledge/giant-metrewave-radio-telescope-gmrt-indias-3rd-facility-to-bag-ieee-milestone-status-1606917288-1

~ ~ ~

Link to tweet