Indian scientists discover new way to power radio sources in the universe



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universe, radio waves, astronomers, radio galaxies, radio frequencies, broadcasts, cambridge university, pune news, indian news
Radio galaxies are a small subset of galaxies that emit exceptionally strong radio frequency emissions.

In a first, a team of Indian astronomers discovered in the universe sources capable of emitting radio waves according to a mechanism never known before using the giant Metrewave radio telescope (GMRT) located at Khodad in Junnar, about 80 km from Pune. .

The team, led by the TIFR-National Radio Astronomy Center (NCRA), which operates the GMRT, said it has discovered a rare source called Extragalactic Extremely Spectral Sources. According to the team, this discovery could pave the way for new studies on another theory suggesting that radio sources are powered outside the law of consumption.

"In the case of special sources of aggregates, magnetic flux drops at low frequencies and capturing this sudden drop is extremely difficult. This was only possible thanks to the high sensitivity of the GMRT and its low-range feature. We have taken specific action because such emissions have been captured at frequencies around 150 MHz (megahertz), "said The Indian Express, lead researcher at INRC, Ishwar Chandra.

Radio galaxies are a small subset of galaxies that emit exceptionally strong radio frequency emissions. Until now, astronomers believed that all these sources emitted radio waves due to the law of power. But a section of scientists, including astronomer Mark Henry of the University of Cambridge in 1967, had suggested that not all sources were powered under this law. "Thus, if a radio spectrum was decreasing at a speed above +2.5, it was excluded under the power law. But now, there is an alternative theory that will begin to emerge because we can confirm that not all sources need to be classified in the law of power. However, the number of these sources is still low, "said Chandra.

The NCRA team, composed of Gopal Krishna of the Aryabhatta Observational Science Research Institute; Mukul Mhaskey, Surajit Paul and Sameer Salunke of the Savitribai Phule Pune University; Pratik Dhabadhe of the Interuniversity Center for Astronomy and Astrophysics; Sandeep Sirothia of Square Kilometer Array, South Africa, and a former scientist at ANREC, is currently involved in an advanced study on finding such sources with the help of the upgraded GMRT (uGMRT).

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