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Illustration of the galaxy called CQ4479. IANS

Researchers have discovered a galaxy that has been managing to survive a black hole’s hunger by continuing to birth new stars, about 100 Sun-sized stars a year.

The discovery from NASA’s telescope on an airplane, the Stratospheric Observatory for Infrared Astronomy (SOFIA), can help explain how massive galaxies came to be, even though the universe today is dominated by galaxies that no longer form stars, according to the study published in the Astrophysical Journal.


“This shows us that the growth of active black holes doesn’t stop star birth instantaneously, which goes against all the current scientific predictions,” said study co-author Allison Kirkpatrick, Assistant Professor at the University of Kansas in Lawrence, Kansas, US.

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“It’s causing us to re-think our theories on how galaxies evolve.”

SOFIA, a joint project of NASA and the German Aerospace Center, DLR, studied an extremely distant galaxy, located more than 5.25 billion light-years away called CQ4479.

At its core is a special type of quasar that was recently discovered by Kirkpatrick called a “cold quasar.”

In this kind of quasar, the active black hole is still feasting on material from its host galaxy, but the quasar’s intense energy has not ravaged all of the cold gas, so stars can keep forming and the galaxy lives on.


The extremely active black hole at the galaxy center is consuming material so fast that the material is glowing as it spins into the black hole’s center, forming a luminous quasar. Pixabay

This is the first time researchers have a detailed look at a cold quasar, directly measuring the black hole’s growth, star birth rate, and how much cold gas remains to fuel the galaxy.

Want to read more in Hindi? Checkout: ट्रांसजेंडर्स के अधिकारों के लिए विकसित हुआ राष्ट्रीय पोर्टल

“We were surprised to see another oddball galaxy that defies current theories,” said Kevin Cooke, a postdoctoral researcher at the University of Kansas in Lawrence, Kansas, and lead author of this study.

“If this tandem growth continues both the black hole and the stars surrounding it would triple in mass before the galaxy reaches the end of its life.”

As one of the brightest and most distant objects in the universe, quasars, or “quasi-stellar radio sources,” are notoriously difficult to observe because they often outshine everything around them.

ALSO READ: Space Travel Makes Cell’s Energy Production Dysfunctional

They form when an especially active black hole consumes huge amounts of material from its surrounding galaxy, creating strong gravitational forces. (IANS)


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Tokyo Olympics 2020 Indian wrestler Ravi Kumar enter semi finals.

Indian wrestler Ravi Kumar (57kg) and Deepak Punia (86kg) enjoyed fruitful outings at the Tokyo Olympic Games as they secured semifinal berths in their respective weight categories at the Makuhari Messe on Wednesday.

On the opening day of the wrestling competition, Ravi Kumar defeated Bulgaria's Georgi Vangelov 14-4 on technical superiority to reach the last-four in the men's 57kg category, while compatriot Deepak Punia overcame China's Zushen Lin 6-3 on points to advance to the semifinals.

Ravi Kumar will take on Nurislam Sanayev of Kazakhstan in the last-four, while Punia will be up against David Morris Taylor of the USA.

Earlier, Ravi Kumar had won his opening-round bout by technical superiority against Colombia's Oscar Tigreros to secure a quarterfinal spot. Competing in the Round-of-16 bout against the Colombian wrestler, the 23-year-old Ravi Kumar, who is making his Olympic debut, showed no nerves as he dominated the bout to win by technical superiority (13-2).

Ravi Kumar landed attack after attack and went 13-2 up, winning the bout by technical superiority with minutes to spare. In wrestling, building up a 10-point lead over the opponent results in a victory by technical superiority.

India's 86kg freestyle wrestler Deepak Punia showed no signs of the niggle that had forced him to pull out of the Poland Open Ranking Series in Warsaw in June, as he defeated Nigeria's Ekerekeme Agiomor on technical superiority to secure a quarterfinal berth.

He got his Olympic campaign to a fine start as he was in control from the start of the bout and hardly ever allowed his Nigerian opponent any room to maneuver his moves, finally winning with a 12-1 on technical superiority.

Punia, who had also suffered an elbow injury just before the Games, was slow at the start but came into his own as the bout progressed, inflicting takedowns at regular intervals to earn points.

The Indian wrestler eased into a 4-1 lead at the break and extended his lead comfortably in the second period.

Punia, the silver medallist from the 2019 world wrestling championships, then set up a clash with China's Lin Zushen in the quarterfinals and defeated him 6-3.

(IANS/HP)