According to a new study published in the journal Nature, the primary mechanism for stopping star formation in galaxies is the so-called ‘strangulation,’ in which the supply of cold gas to the galaxy is halted. Artist’s impression of one of the possible galaxy strangulation mechanisms: star-forming galaxies (fed by gas inflows) are accreted into a massive hot halo, which ‘strangles’ them and leads to their death. Image credit: University...
 