Scientists figured out how super-Huge black holes turn galaxies into cosmic graveyards - Physics-Astronomy.org

Scientists figured out how super-Huge black holes turn galaxies into cosmic graveyards

An global team of Astronmers  appears to have solved a long-standing mystery in astronomy, identifying the potential cause of what turns galaxies from vibrant, star-producing systems into regions of space where no new stars are born.
According to the scientists, this phenomenon – called quenching, where galaxies cease to create new stars – might be caused by low-energy super-Huge  black holes, which produce interstellar winds of such heat and intensity that they suppress the ability of stars to form throughout whole galaxies. And the team thinks that galaxies having  these kinds of supermassive black holes – called 'red geysers' – could be quite ordinary, suggesting that lots of star systems are now effectively dormant as a result.

If the findings are confirmed, it's a major discovery, with this 'galactic warming' explanation one of the main disparities of the cosmos: what it is that separates active galaxies from sleeping or 'quiescent' star systems?
"Stars form from [gas], a bit like the drops of rain condense from the water vapour," said one of the team, astrophysicist Michele Cappellari from Oxford University in the UK. "And in both cases one wants the gas to cool down, for condensation to happen. But we could not understand what was preventing this cooling from occurrence in many galaxies."
Given  various quiescent galaxies have enough gas within them to keep producing new stars, the Scientists  knew something else had to be responsible for inducing this sleepy state – but until now, no one knew what exactly that was.
"It was like having deserts in densely clouded regions," said one of the researchers, Edmond Cheung from the University of Tokyo in Japan. "We knew quiescent galaxies wanted some way to suppress star formation, and now we think the red geysers phenomenon may represent how typical quiescent galaxies maintain their quiescence."
Scientists figured out how super-Huge black holes turn galaxies into cosmic graveyards
The team thinks that old galaxies known as red geysers – so-called because they're lacking in bright, blue young stars – are transformed from active galaxies due to the pull of super-massive black holes.

In the artist's impression above, you can see an example of the phenomenon, with galactic warming occurring through the interaction of two distant galaxies, affectionately nicknamed by Cheung as Akira (on the right) and Tetsuo (on the left).

A super-Huge  black hole at the centre of Akira sucks gas from neighbouring Tetsuo, and the intense wind forces generated in the process raise the level of heat in ambient gas throughout Akira, suppressing the birth of any new stars and turning the system into a red geyser.

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