Abstract
The propagation and evolution of cold galactic winds in galactic haloes is crucial to galaxy formation models. However, modelling of this process in hydrodynamic simulations of galaxy formation is oversimplified owing to a lack of numerical resolution and often neglects critical physical processes such as hydrodynamic instabilities and thermal conduction. We propose an analytic model, Physically Evolved Winds, that calculates the evolution of individual clouds moving supersonically through a uniform ambient medium. Our model reproduces predictions from very high resolution cloud-crushing simulations that include isotropic thermal conduction over a wide range of physical conditions. We discuss the implementation of this model into cosmological hydrodynamic simulations of galaxy formation as a subgrid prescription to model galactic winds more robustly both physically and numerically.
Original language | English (US) |
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Pages (from-to) | 2586-2604 |
Number of pages | 19 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 497 |
Issue number | 3 |
DOIs | |
State | Published - Sep 1 2020 |
Keywords
- galaxies: Evolution
- hydrodynamics
- methods: Analytical
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science