Meta-cold dark matter

Meta-cold dark matter, also known as mCDM, is a form of cold dark matter proposed to solve the cuspy halo problem. It consists of particles "that emerge relatively late in cosmic time (z ≲ 1000) and are born non-relativistic from the decays of cold particles".^[1]

Notes

1. ↑ Strigari, Louis; Kaplinghat, Manoj; Bullock, James (2007). "Dark Matter Halos with Cores from Hierarchical Structure Formation". Physical Review D 75 (6). arXiv:astro-ph/0606281. doi:10.1103/PhysRevD.75.061303.