The Role of the Parker Instability in Structuring the Interstellar Medium

18 Mar 2020 Heintz Evan Bustard Chad Zweibel Ellen

The Parker instability, a Rayleigh-Taylor like instability of thermal gas supported against gravity by magnetic fields and cosmic rays, is thought to be dynamically important for galaxy evolution, possibly promoting molecular cloud formation and the galactic dynamo. In previous work, we examined the effect of three different cosmic ray transport models on the Parker instability: decoupled ($\gamma_c = 0$), locked to the thermal gas ($\gamma_c = 4/3$) and coupled to the gas with streaming by self-confinement... (read more)

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  • ASTROPHYSICS OF GALAXIES