Angular momentum evolution for galaxies

TL;DR

This study uses cosmological simulations to analyze how galaxy angular momentum relates to morphology, confirming theoretical models and revealing size relations across different galaxy types.

Contribution

It demonstrates that both disk and spheroidal components follow theoretical angular momentum relations, with spheroids showing angular momentum loss, and finds a universal size relation regardless of morphology.

Findings

Disk angular momentum follows Mo, Mao & White (1998) relation.

Spheroidal component also follows the relation but with angular momentum loss.

Galaxy size correlates universally across morphological types.

Abstract

Using cosmological hydrodynamics simulations we study the angular momentum content of the simulated galaxies in relation with their morphological type. We found that not only the angular momentum of the disk component follow the expected theoretical relation, Mo, Mao & Whiye (1998), but also the spheroidal one, with a gap due to its lost of angular momentum, in agreement with Fall & Romanowsky (2013),. We also found that the galaxy size can plot in one general relation, despite the morphological type, as found by Kravtsov (2013).