Speaker
Description
Ram Pressure Stripping of satellite galaxies is an important mechanism for enriching the Circumgalactic Medium (CGM). Simulations show that satellites contribute a non-negligible quantity of metals to the CGM, inducing cooling and enhancing accretion onto the central galaxy. Simulations without metal-line cooling in the CGM show systematically lower stellar masses.
While ram pressure stripping has been studied extensively using hydrodynamical simulations, little work has been done to explore the effects that magnetic fields have on ram pressure stripping.
Magnetic fields are known to be present throughout the CGM and in the tails of ram pressure stripped cluster galaxies - known as jellyfish galaxies.
In this talk, I will discuss our work exploring the effects of magnetic fields on ram pressure stripping and the subsequent evolution of the stripped material.
We do this using high resolution cosmological zoom-in simulations of massive galaxy haloes. We use the Auriga galaxy formation model and the moving-mesh, magneto-hydrodynamics code, AREPO.
For a suite of simulations with and without magnetic fields, we analyse mass loss rates for a sample of satellite galaxies, and study the evolution of their stripped tails. We determine the origin of the cool gas in the tail and explore the mechanisms behind differences in the evolution of the tail.
We conclude that for massive satellites in the CGM, magnetic fields can severely limit the rate of ram pressure stripping and hamper interactions between the stripped tail and the host CGM through magnetic draping and suppression of fluid instabilities.
