Radio wave images reveal thousands of star-forming galaxies … Know the details


An international team of astronomers spotted thousands of galaxies in the process of making stars using ultra-sensitive radio images, as scientists collected images of the early universe using the International Low-Frequency Telescope (LOFAR), which is a cross-European network of radio antennas, and works by combining signals from more than 70,000 antennas, located in stations across the Netherlands and in European partner countries including the United Kingdom.
By observing the same areas of the sky over and over and combining data to create a very long exposure image, the team discovered the faint radio glow of stars that explode, in tens of thousands of galaxies to the most distant parts of the universe.

Radio images
Radio images of galaxies

Also, for image production, more than four petabytes of raw data, equivalent to around one million DVDs, have been captured and processed.

“When we look at the sky with a radio telescope, the brightest objects we see are caused by the massive black holes in the center of galaxies,” said Philip Best of the University of Edinburgh, who led the deep survey.

“However, our images are so deep that most of the objects in them are galaxies like our Milky Way, which emit faint radio waves that track continuous star formation,” Best added.

“The combination of LOFAR’s high sensitivity and the vast area of ​​sky covered by our survey enabled us to discover tens of thousands of galaxies like the Milky Way, far in the far distance to the universe,” Best said.

“Light from these galaxies travels for billions of years to reach Earth, and this means that we see galaxies as they were billions of years ago, when they formed most of their stars,” Best continued.

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Source :” the seventh day


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