Variable stars could provide a cosmic yardstick for the accelerating Universe
New evidence shows that the Universe is expanding faster than expected as scientists cannot yet explain the discrepancy between their models and new measurements. It remains unclear whether this 'crisis in cosmology' should call for new physics to settle the controversy over the Hubble's constant or whether this value is subject to underestimated systematic errors. Many tools including variable stars, such as Cepheids, are used to calculate the expansion rate over time. The EU-funded H1PStars project will conduct research to mitigate biases that could shift the centre value of reported Hubble's constant measurements and quantify relevant systematic uncertainties. Project results could reinforce understanding of how solid the cosmic distance ladder is.
Fields of science
Funding SchemeERC-STG - Starting Grant
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