CERN Scientists Announce New Way to Find Gravitational Waves

In an article published in Physical Review Letters, Valerie Domke from CERN and Camilo Garcia-Celi from DESY

(Research Center for Particle Physics)report a new method for searching for gravitational waves - ripples in the fabric of space-time. They were first discovered by the LIGO and Virgo collaborations in 2015, and in 2017, Rainer Weiss, Barry Barisch, and Kip Thorne received the Nobel Prize in Physics for this discovery.

The Domke and Garcia-Seli technique is based onconverting high frequency gravitational waves (from megahertz to gigahertz) into radio waves. This transformation occurs in the presence of magnetic fields and distorts the relic radiation of the early universe, known as the cosmic microwave background, that permeates the universe.

In a new study, scientists were able to show thatThis distortion, deduced from the cosmic microwave background data obtained with radio telescopes, can be used to search for high frequency gravitational waves. We are talking about waves generated by cosmic sources from the earliest universe.

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In space, they found gravitational waves that change space and time. What does it mean?

Gravitational waves - changes in gravitationalfields spreading like waves. They are emitted by moving masses, but after radiation they break away from them and exist independently of these masses. Mathematically related to the perturbation of the space-time metrics and can be described as "ripples of space-time".

The relic radiation is thermal radiation uniformly filling the Universe, which arose during the epoch of primary hydrogen recombination.