Astronomers detect ancient hydrogen signal that could help map the Universe
Astronomers have successfully detected faint radio signals from neutral hydrogen billions of light-years away using the MeerKAT telescope. This method, known as hydrogen intensity mapping, allows for more efficient 3D mapping of the universe's structure compared to traditional galaxy-by-galaxy surveys.
Why it matters
This breakthrough provides a more efficient tool for cosmologists to map the distribution of matter in the early universe, aiding our understanding of cosmic evolution.
Astronomers have directly detected an extraordinarily faint radio signal from hydrogen gas billions of light-years away, demonstrating a promising new method for mapping the vast structure of the Universe.
The international team, led by researchers at the University of Manchester and the University of the Western Cape, used South Africa's MeerKAT radio telescope to measure emissions from neutral hydrogen dating to a period when the Universe was several billion years younger than it is today.
Published in The Astrophysical Journal Letters , the results highlight the growing potential of hydrogen intensity mapping, a technique designed to survey enormous regions of space far more efficiently than methods that rely on identifying galaxies individually.
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