Stellar mass as the ‘glocal’ driver of galaxies’ stellar population properties

The properties of the stellar populations in a galaxy are known to correlate with amount and distribution mass. We take advantage maps light-weighted mean age Agewr metallicity Z*wr for sample 362 galaxies from integral-field spectroscopic survey CALIFA (summing up >600,000 individual regions approximately 1 kpc linear size), produced our previous works, investigate how these local react stellar-mass surface density mu* global total mass M* e. establish existence i) dual mu*-Agewr relation, resulting young sequence an old ridge, ii) mu*-Z*wr overall independent regions. parameters (M* and, possibly secondarily, e) determine set maximum attainable mu*, which increases M*. affects shape normalization relations threshold $\sim 10^{10.3}$ MSun, above they remain unchanged. conclude that is "glocal" (i.e. simultaneously local) driver population properties. consider mass-age mass-metallicity connected, particular discuss it possible, single produce two different quiescent star-forming respectively, as reported literature. Structural differences classes key explain duality scaling appear essential modelling baryonic cycle galaxies.