Simulating the interstellar medium and stellar feedback on a moving mesh: implementation and isolated galaxies
Name
1905.08806.pdf
Description
Accepted version
Size
13.63 MB
Format
Unknown
Checksum (MD5)
ca89e966a8fad17dec8804f07d73302b
Author(s)
Marinacci, Federico
Sales, Laura V
Vogelsberger, Mark
Torrey, Paul
Springel, Volker
Date Issued
2019
Journal
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Version
Author's final manuscript
Abstract
© 2019 The Author(s). We introduce the Stars and MUltiphase Gas in GaLaxiEs - SMUGGLE model, an explicit and comprehensive stellar feedback model for the moving-mesh code AREPO. This novel sub-resolution model resolves the multiphase gas structure of the interstellar medium and selfconsistently generates gaseous outflows. The model implements crucial aspects of stellar feedback including photoionization, radiation pressure, energy, and momentum injection from stellar winds and from supernovae. We explore this model in high-resolution isolated simulations of Milky Way like disc galaxies. Stellar feedback regulates star formation to the observed level and naturally captures the establishment of a Kennicutt-Schmidt relation. This result is achieved independent of the numerical mass and spatial resolution of the simulations. Gaseous outflows are generated with average mass loading factors of the order of unity. Strong outflow activity is correlated with peaks in the star formation history of the galaxy with evidence that most of the ejected gas eventually rains down on to the disc in a galactic fountain flow that sustains late-time star formation. Finally, the interstellar gas in the galaxy shows a distinct multiphase distribution with a coexistence of cold, warm, and hot phases.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1093/MNRAS/STZ2391
