How do different spiral arm models impact the ISM and GMC population?

@article{Pettitt2020HowDD,
  title={How do different spiral arm models impact the ISM and GMC population?},
  author={Alex R. Pettitt and Clare L. Dobbs and Junichi Baba and D. Colombo and Ana Duarte-Cabral and Fumi Egusa and Asao Habe},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={498},
  pages={1159-1174}
}
The nature of galactic spiral arms in disc galaxies remains elusive. Regardless of the spiral model, arms are expected to play a role in sculpting the star-forming interstellar medium. As such, different arm models may result in differences in the structure of the interstellar medium and molecular cloud properties. In this study we present simulations of galactic discs subject to spiral arm perturbations of different natures. We find very little difference in how the cloud population or gas… 

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