Des chercheurs de la Nasa nous offrent d’écouter les sons émis par des trous noirs. © sakkmesterke, Adobe Stock

Listen to the “howling” of the black hole!

“In space, no one will hear you screaming.” All who have seen alien, Known. Because in the vacuum of space, no sound can propagate. in the void. But in a group of galaxies surrounded by gas, there is something else. And now NASA researchers offer us something incredible. Let’s hear… the black hole song!

Perseus block is galaxy cluster Located about 250 millionlight years in Earth. It contains nearly 200 galaxies. In its center is a black hole. In 2003, NASA researchers discovered that waves emitted from this black hole cause ripples in the cluster’s hot gas. Ripples they translate into musical notes. Note, however, inaudible tohuman ear Since about 57 octaves below middle C.

today is Astronomy scientists Introducing what we might call a new sonication of what Black hole. Although this time they wanted to reconsider the actual sound waves detected in the data from the space observatory X ray Chandra. what or what? Real sound waves? But do not say that there is There is no sound in space?

Sounds from other black holes

This is true when the studied space is empty. But a galaxy cluster contains hundreds of galaxies. Large amounts of gas surround them. This allows sound waves to propagate. And these are the waves that astronomers here extracted to make them audible by increasing to hesitate Several million times.

Researchers are also working on sonicating another black hole. Perhaps the most famous of them, because it is the M87 which The first picture Obtained fromevent horizon telescope The EHT was revealed in 2019. However, astronomers do not rely on this image to extract sounds from it. But on the others, referred to by ChandraTalk Hubble Space Telescope and by the large millimeter/submillimeter grid of Atacama (Alma, Chile). data for wavelengths Different that researchers match with a different set of vocal tones. Lowest for waves radio from Alma, midtones for optical data from Hubble and higher tones for X-rays from Chandra.

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