The Digital Press

This study analyzes how cosmic voids—vast, empty regions in space—evolve over time using galaxy and dark matter data from the TNG300 simulation. It reveals how the density patterns inside these voids change and highlights differences between galaxy and dark matter distributions.

Why it matters: Understanding void density profiles helps clarify large-scale cosmic structure formation and matter distribution.

The big picture: Voids show inverse top-hat density profiles whose details evolve more for dark matter than galaxies across cosmic time.

Stunning stat: Each snapshot identifies roughly 100–200 of the largest significant voids spanning 11.65 billion years from redshift 3 to 0.

Quick takeaway: Galaxy and dark matter densities relate linearly, with slope matching galaxy bias, varying by void environment type.