Angular Momentum and Morphological Sequence of Massive Galaxies through Dark Sage

Abstract We study the present-day connection between galaxy morphology and angular momentum using D ark S age semi-analytic model of formation. For a given stellar mass in range 10 –10 12 M ⊙ , predicts that galaxies with more prominent disks exhibit higher disk specific ( j stellar,disk ). However, when we include gas disk, bulge-dominated have highest total total,disk attribute this to large contribution from an extended cold typical galaxies. Note while momenta = J / ) these are large, their masses negligible. Thus, is small. also find relationship dark matter be counterintuitive. Surprisingly, range, not only do tend live halos than disk-dominated galaxies, but intermediate (those roughly equal fractions bulge mass) lowest all. Yet, controlling for halo mass, rather vanishes. Based on results, mass—rather momentum—is main driver predicted sequence high range. In fact, our one-fifth counterparts.