A new model for including galactic winds in simulations of galaxy formation – I. Introducing the Physically Evolved Winds (PhEW) model

Shuiyao Huang*, Neal Katz, Evan Scannapieco, J'Neil Cottle, Romeel Davé, David H. Weinberg, Molly S. Peeples, Marcus Brüggen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

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 over-simplified 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 (PhEW), 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 sub-grid prescription to model galactic winds more robustly both physically and numerically.
Original languageEnglish
Pages (from-to)2586-2604
Number of pages19
JournalMonthly Notices of the Royal Astronomical Society
Volume497
Issue number3
Early online date8 Jul 2020
DOIs
Publication statusPublished - 1 Sept 2020

Keywords / Materials (for Non-textual outputs)

  • astro-ph.GA

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