Monthly Notices of the Royal Astronomical Society · 29 July 2026 · From issue 13
In a simulated universe, star forming galaxies drift inward, throwing off growth rate measurements.
Ken Osato, Teppei Okumura, Clustering of emission line galaxies with IllustrisTNG - II. cosmology challenge with anisotropic correlation functions and ELG-halo connections, Monthly Notices of the Royal Astronomical Society.
Galaxies that glow with active star formation are used to map the large-scale structure of the universe. In a computer simulation, these glowing galaxies tend to fall inward toward the center of their dark matter clumps. This inward motion makes scientists underestimate a key number that describes how fast cosmic structures grow. The bias disappears when scientists only look at very large distances, beyond about 15 times 3.26 million light years.
The distance scale beyond which the growth rate measurement bias disappears.
Simulation only, no real survey data tested yet.
Integrity screen: passed (3 checks) Checked 30 July 2026. Retraction record: none. DOI resolves at doi.org. Metadata record found (Monthly Notices of the Royal Astronomical Society). Read the source
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