In musical terms, the pitch of the sound generated by the black hole translates into the note of B flat, 57 octaves below middle-C.
With a frequency over a million, billion times deeper than the limits of human hearing, it is the deepest note ever detected from an object in the Universe.
“The Perseus sound waves are much more than just an interesting form of black hole acoustics,” says Steve Allen of the Institute of Astronomy in Cambridge, England. “These sound waves may be the key in figuring out how galaxy clusters, the largest structures in the Universe, grow.”
Astronomers obtained an image from the orbiting Chandra X-ray telescope showing ripples in the gas filling the Perseus galactic cluster. According to researchers, the ripples are evidence of sound waves that have travelled hundreds of thousands of light years from the cluster’s central black hole.