Abstract
Using new HI spectral line imaging from the Very Large Array, I examine low-mass galaxies NGC 5238 and DDO 68. These are two unique dwarf galaxies with disturbed stellar morphology suggestive of a history of interaction events. I present an in-depth analysis of their HI kinematics, comparing gaseous and stellar structures, as well as a synthesis of the results of simulations constrained with these new HI data. I find that both galaxies have a highly disturbed gaseous structure that can be well explained through a history of mergers, making NGC 5238 and DDO 68 flagship examples of hierarchical assembly on the smallest of scales.
Recommended Citation
Schisgal, Lila
(2025)
"Galactic Building Blocks: Disturbed HI and Hierarchical Assembly in DDO 68 and NGC 5238,"
Macalester Journal of Physics and Astronomy: Vol. 13:
Iss.
1, Article 3.
Available at:
https://digitalcommons.macalester.edu/mjpa/vol13/iss1/3