A photo from open sources
European Space Agency (ESA) describes giant elliptical galaxies as “the most mysterious galaxies in Of the universe. “Astronomers were puzzled by these” red and dead ” galaxies. The galaxies got their name because of their red color and lack of star formation. Usually these galaxies filled with red old stars. Astronomers previously believed that galaxies are dead because they didn’t have enough cold gas to form stars, which is the main fuel for of this process. However, a recent study led by Norbert Werner from Stanford University discovered an abundance of cold gas in some red and dead galaxies not previously studied. “It’s strange that having a lot of cold gas in your these galaxies for some reason do not form stars, “said research co-author Raymond Unk of the Netherlands Institute radio astronomy. The answer was found in giant black holes in centers of these galaxies. Central supermassive black holes in these galaxies absorb cold gas, which is why they themselves grow faster. However, they push out high-energy charged particles that make the gas warm, and this prevents the formation of stars. ESA sums up: “The Jet particles emitted by a central supermassive black hole, heats the gas and makes it cloudy, which prevents its conversion into the stars. “” These galaxies are red, but given the presence of of them giant black holes instead of nuclei that absorb fuel to form stars, they can’t be called dead, “he said. Werner.
Galaxy black hole
