Galaxy redshift surveys on a massive scale are incredibly valuable tools for exploring the universe in this age of precise cosmology. By examining numerous spectra from galaxies far away, astronomers can construct density maps of galaxies at different points in the universe’s history. These maps contain vital details about how galaxies cluster together, which can be measured using both two-point and N-point (N>2) correlation functions.
“The information found in N-point functions complements that of two-point functions significantly,” explained Zhao Gongbo, a key researcher at NAOC. “N-point functions are essential for investigating dark energy, dark matter, and gravity.”
Despite their importance, utilizing N-point functions in practical applications is challenging due to the complexities involved in measuring and modeling these functions.
After years of effort, Zhao and his team have devised a novel approach to extract information from N-point functions using data from two-point functions.
2024-04-20 18:51:02
Article from phys.org