Scientists from McGill University in Canada and the Institute of Science (IISc) in Bangalore An unprecedented 8-billion-year-old radio signal from atomic hydrogen detected in a very distant galaxy,
According to a report published on the BGR website, the galaxy from which the signal originated comes from a redshift galaxy identified as Z = 1.29. Due to the extreme distance from the Milky Way, the emission line was shifted from their expected 21 cm line to the 48 cm line.
The most important thing about this discovery is that experts say that the galaxy from which it originated existed when the universe was only 4.9 billion years oldThe source of the 8.8-billion-year-old record radio signal.
How did they get the Milky Way?
The detection was possible because the scientists used gravitational lensing to capture and track the signal back to its home galaxy. The magnification of the lens was a factor of 30, the scientists explained, allowing the group to see through the higher redshifts of the universe. Furthermore, the team observed that the mass of atomic hydrogen in the Milky Way was twice that of its stellar mass.
The team of astronomers used data from the Giant VHF Radio Telescope (GMRT) in Pune. The instrument enabled the team to detect an unprecedented radio signal originating from the distant galaxy, helping the researchers to further their search.
The findings were published in Monthly Notices of the Royal Astronomy Society and show the general feasibility of observing nuclear gas in galaxies at long distances, It may also open new doors for probing the cosmic evolution of neutral gas with existing and future low-frequency radio telescopes.
By detecting these types of record-breaking radio signals, we may be able to use similar examples to unearth the secrets of the early universe.