Dark Matter (DM) thought to make up 85% of matter in the universe, dark matter is nonluminous and its nature is not well understood. While normal matter absorbs, reflects, and emits light, dark matter cannot be seen directly, making it harder to detect. A theory called “self-interacting dark matter” (SIDM), proposes that dark matter particles self-interact through a dark force , strongly colliding with one another close to the center of a galaxy . This theory potentially resolves inconsistencies in dark matter densities observed in different galaxies, posing a challenge to the traditional “cold dark matter” (CDM) model and highlighting the dynamic nature of dark matter.
“A Self-interacting Dark Matter Solution to the Extreme Diversity of Low-mass Halo Properties” by Ethan O. Nadler, Daneng Yang and Hai-Bo Yu, 30 November 2023, https://scitechdaily.com/astrophysical-enigmas-solved-by-emerging-dark-matter-theory/
