Google News
logo
Daily Current Affairs
Which University in Canada and the Indian Institute of Science (IISc) have detected a radio signal, originating from atomic hydrogen in a distant galaxy?
A)
University of Toronto
B)
Dalhousie University
C)
McGill University
D)
Laval University

Correct Answer :   McGill University


Astronomers from McGill University in Canada and the Indian Institute of Science (IISc) have used data from the Giant Metrewave Radio Telescope (GMRT), in Pune, to detect a radio signal originating from atomic hydrogen in an extremely distant galaxy.
 
The IISc said on Monday that the astronomical distance over which the signal has been picked up is “the largest so far by a large margin”. 
 
The findings have been published in the Monthly Notices of the Royal Astronomical Society.
 
While detection of radio waves with 21 cm wavelength, emitted by atomic hydrogen, is possible through low-frequency radio telescopes like GMRT, the “extremely weak” nature of the radio signal makes it nearly impossible to detect emissions from a distant galaxy. 
 
The most distant galaxy detected through the 21-cm emission, so far, was at redshift z=0.376..

Source : Deccan Herald
 

Published On : January 18, 2023
Advertisement