What determines the maximum stellar surface density of galaxies?

Chih-Teng Ling, Tetsuya Hashimoto, Tomotsugu Goto +5

Observationally, it has been reported that the densest stellar system in the Universe does not exceed a maximum stellar surface density, ${\Sigma }_{\ast }^{\max }$ = $3\times 10^5$M${}_{\odot }$pc…