Fast radio bursts were used as 'cosmic weigh stations' to find the sparsely distributed matter.
FRBs are extremely bright and short-lived radio signals that were first discovered in 2007. Because they are so short-lived, most of the first FRBs were only found in telescope data long after the event had passed, making tracing their source extremely difficult. While scientists do not know what could be producing these bursts, they appear to release huge amounts of energy—equivalent to what our sun produces in almost a century.
Macquart and colleagues were able to use these FRBs as"cosmic weigh stations." By measuring the distances of FRBs, they were able to work out the density of the universe."The discovery of fast radio bursts and their localization to distant galaxies were the key breakthroughs needed to solve this mystery," study author J. Xavier Prochaska, from the University of California Santa Cruz, said in a statement.
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