Kinematic Decomposition of IllustrisTNG Disk Galaxies: Morphology and Relation with Morphological Structures

  title={Kinematic Decomposition of IllustrisTNG Disk Galaxies: Morphology and Relation with Morphological Structures},
  author={Min Du and Luis C. Ho and Victor P. Debattista and Annalisa Pillepich and Dylan Nelson and Dongyao Zhao and Lars Hernquist},
  journal={The Astrophysical Journal},
We recently developed an automated method, auto-GMM to decompose simulated galaxies. It extracts kinematic structures in an accurate, efficient, and unsupervised way. We use auto-GMM to study the stellar kinematic structures of disk galaxies from the TNG100 run of IllustrisTNG. We identify four to five structures that are commonly present among the diverse galaxy population. Structures having strong to moderate rotation are defined as cold and warm disks, respectively. Spheroidal structures… 
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