Kids datasets ultimately do not shake up the cold dark matter model, researchers say
The Omega Cam Camera is located in the heart of the VST. It is built around 32 CCD detectors that create 268 megapixel images together. The camera includes a guide and active optical system, as well as an additional CCD to control many huge color filters. The Omegacam was designed and constructed by a consortium that includes research institutes in the Netherlands, Germany and Italy, thanks to a major contribution from Eso. Credit: ESO/INAF-VST/OMEGACAM/O. iwert
Data from 41 million galaxies, after all, does not shake up a standard universe model. In conclusion, to their own surprise, an international team of researchers, including Koen Kuijken, a professor at the Leiden Observatory.
Astronomers published their findings this week in five papers, Conference and Journal Astronomy and Astrophysics. In 2020, based on preliminary data, researchers still thought the universe was 10% more uniform than expected.
For eight years, Kilo-Degree Survey (Kids) collected data from the southern skies using the European VLT survey telescope in Chile. Recently, the complete dataset, Kids Legacy, has been published, and researchers have published their final findings.
Everything fits suddenly
“The results are unexpected,” says Kuijken, leader of the Kids Project. “To date, we’ve always found ‘tensions’, tensions with a standard model of stocks, but everything suddenly fits exactly. ” In particular, Kuijken points to a previous child analysis in 2020 that partially questioned the standard model.
“It was surprising that the results are so different now to previous analysis, but we can explain them retrospectively,” says Angus Wright of Ruhr University Bochum (Germany). He is the first author of three of five publications to be released soon.
Researchers analyzed the entire child dataset using improved methods, new computer simulations, and better calibration data. And now the results are consistent with the so-called Lambda-Cold-Dark-Matter model.
Provided by Leiden University
Quote: Kids Datasets will not shake up the cold dark matter model, researchers (2025, April 1) retrieved April 2, 2025 from https://phys.org/news/2025-04-kids-dataset-doesnt-cold-dark.html
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