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

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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 languageEnglish (US)
Pages (from-to)2586-2604
Number of pages19
JournalMonthly Notices of the Royal Astronomical Society
Volume497
Issue number3
DOIs
StatePublished - Sep 1 2020

Keywords

  • galaxies: Evolution
  • hydrodynamics
  • methods: Analytical

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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