Mówca
Opis
The star-forming main sequence provides a compact description of how galaxies build their stellar mass as a function of cosmic time. In this talk, I will present a continuity-equation framework for translating an observed redshift-dependent star-forming main sequence into the predicted evolution of the galaxy stellar mass function. Starting from observed high-redshift stellar mass functions, galaxies are evolved through stellar-mass space according to their main-sequence star formation rates, while accounting for stellar mass recycling, quenching, and merger-driven growth and destruction. The resulting evolved mass functions are then compared with observed measurements at later cosmic times, providing a direct consistency test of whether the adopted main-sequence prescription can reproduce the build-up of the galaxy population.
I will show how different literature main-sequence parametrizations affect the predicted mass growth, and how mock star-formation histories derived from the continuity equation can be compared with standard SED-fitting assumptions. This project forms one component of a broader SONATA Bis programme aimed at using JWST, ALMA, JCMT/SCUBA-2 and ancillary multi-wavelength data to quantify the evolution of star-forming and quiescent galaxies, their dust-obscured star formation, and the cosmic star-formation rate density out to the reionization era.