text:   Theoretical Approach",3,"['On astro-ph today we posted a paper where we argue that individual galaxy halo masses can be measured using a new hybrid theory/observational approach.    <LINK>', 'One result is the following -- the stellar mass to halo mass ratio is relatively constant up to z~3 which has implications for how galaxies acquire their dark and baryonic matter. https://t.co/OPnPLvnDx4', 'Another is that we find a third parameter in the relation between stellar and halo mass which is the time the bulk of the mass of a halo is formed. The earlier the formation, the higher the stellar to halo mass ratio. #DarkMatter #galaxies']",18,06,586