Quenching and Morphological Transformation in Semi-Analytic Models and CANDELS

Understand

We examine the spheroid growth and star formation quenching experienced by galaxies from z~3 to the present by studying the evolution with redshift of the quiescent and spheroid-dominated fractions of galaxies from the CANDELS and GAMA surveys.

• We compare the observed fractions with predictions from a semi-analytic model which includes prescriptions for bulge growth and AGN feedback due to mergers and disk instabilities.
• We facilitate direct morphological comparison by converting our model bulge-to-total stellar mass ratios to Sersic indices.
• We then subdivide our population into the four quadrants of the sSFR-Sersic index plane and study the buildup of each of these subpopulations.