Deepest Radio Images of the Sun Captured by the Indian Scientists (Download PDF)


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In a significant development in the field of Space and Technology, the Scientists at the National Centre for Radio Astrophysics have captured deepest radio images of the Sun recently revealing magnetic fields in the Sun’s atmosphere, the corona which are the energy source for the massive explosions are difficult to measure.

Image shows The Sun as Seen in Different Wavelengths

Image Shows The Sun as Seen in Different Wavelengths

Image shows The Sun as Seen in Different Wavelengths


  • The National Centre for Radio Astrophysics (NCRA) in Pune, Maharashtra have been leading an international group of researchers to understand some of the mysteries behind the Radio images of the Sun.

  • These Radio images images may help predict space weather and its possible effects on Earth.

  • The radiation produced due to the magnetic field is weak like that of a feeble light from a candle.

  • The Sun being a challenging radio source to study as always, the emission from the radio source can change within a second and can be very different even across nearby frequencies as per Mr Divya Oberoi from NCRA.

  • Seeing the coronal emission at radio frequencies can distort and blur the original image.

  • Electric blackouts, satellite damage, disruption of GPS based navigation, and other sensitive systems are some of the possible impacts of the most powerful explosions in the solar system.

  • The magnetic filed is the energy source for these massive explosions

  • Information is very hard to extract when it comes to observations in radio wavelength.

Murchison Widefield Array (MWA) Telescope in Australia

  • The Murchison Widefield Array (MWA) is a joint project between an international consortia of organisations to construct and operate a low-frequency radio array.

  • Easy to keep up with the rapid changes in solar emissions.

  • It makes images of the sun at every half-second interval, and also at hundreds of closely spaced frequencies, totalling to about a million solar images every hour.

An Automated Software Pipeline Known as AIRCARS Developed by the Researchers Recently

  • The contrast of the images obtained from AIRCARS is better than the best solar images available.

  • AIRCARS have further made the understanding of the space weather easy along with the events on the stars for the researchers.

  • This has also led to the discovery of oscillations in the size of the radio-emitting region and its brightness.

  • The images so obtained have also detailed how exactly the radiations get distorted while passing through the corona.

  • In the most recent developments in this field TIFR-NCRA Pune team’s images of the Sun has broadened the understanding of Solar Flares.

- Published/Last Modified on: June 13, 2019

Science/Technology, Space/ISRO

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