- Splinter ISM   (virtual room F)

Numerical studies on the magnetic field structure in the vicinity of superbubbles and the impact of

Frederik Berberich and Michael Schulreich
Berlin Institute of Technology and Humboldt University of Berlin

Supernova remnants as well as stellar winds of the most massive stars can merge if the progenitor stars are clustered close enough like in OB associations. This creates large cavities in the interstellar medium (ISM), called superbubbles (SBs). The evolution of these SBs is affected by many factors, such as the density and temperature distribution of the surrounding ISM, but also the strength and shape of the interstellar magnetic field. To investigate in this complex interplay, magnetohydrodynamical simulations are a useful tool. Thereby a critical, often disregarded aspect is the turbulent nature of the ISM. The calculations presented here focus on the influence of the interstellar magnetic field and introduce a random magnetic field component to mimic the turbulent magnetic field found in the ISM. The idea is to compare different 3D scenarios of SBs propagating into a surrounding unmagnetized medium, a medium with constant magnetic field, and a medium with a magnetic field featuring a random component, respectively. To perform the simulations the RAMSES code is used, which provides a highly parallelized adaptive mesh refinement environment. Therewith subparsec resolution is obtained in the areas of interest. Hence, it is expected that the results are suitable to study the magnetic field structure in detail and that the comparison of the different scenarios provides insight into the influence of the turbulent magnetic field on the evolution of SBs.