Diskursus Network – Chinese scientists recently introduced a new method to reveal the characteristics of the first galaxies and dark matter (dark matter) in the early period of the universe, according to a paper published in the journal Nature Astronomy.
The 21-centimeter absorption line (21-centimeter forest) is a system of narrow absorption lines that appear in the spectrum of a high redshift background source due to interference from neutral hydrogen atoms.
Researchers from the National Astronomical Observatories under the Chinese Academy of Sciences (CAS) studied the previously rarely discussed investigation of the 21-centimeter forest and proposed an innovative statistical measurement scheme.
They found that by using one-dimensional power spectrum measurements of a 21-centimeter forest signal at the cosmic dawn, the soon-to-be-available Square Kilometer Array radio telescope will be able to simultaneously reveal characteristics of dark matter and the early universe’s first galaxies. according to the paper.
The breakthrough method is of great importance for unraveling the mysteries of dark matter and the formation of celestial bodies in the early universe and will further enhance the understanding of dark matter and shed light on the formation and evolution of the universe’s structure, the researchers said. (red/Xinhua)
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2023-07-11 04:49:02
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