Speaker
Description
We present the first simulation of the formation and evolution of a supernova remnant (SNR) in a realistic interstellar environment drawn directly from a galactic simulation. Our study employs magneto-hydrodynamical simulations with the GIZMO code, including detailed interstellar medium (ISM) physics. Unlike previous studies that assume idealized environments, our pre-explosion conditions are taken from a star-forming region in a LMC-like dwarf galaxy extracted from the large-scale cosmological simulation IllustrisTNG. To resolve the local ISM structure, we increase the original resolution of TNG50-1 by a factor of $\sim10^{9}$ in total using a particle-splitting technique and Voronoi refinement, achieving extremely high spatial resolution to obtain the realistic pre-explosion environment for our SNR simulations.
Our simulations show that the pre-explosion environment plays a crucial role in shaping SNR evolution. The clumpy structure of the ISM triggers strong fluid instabilities and enhances mixing of the ejecta compared with uniform-density environments. We also find that magnetic fields are amplified through small-scale dynamo processes. Overall, our results demonstrate that pre-explosion environments shaped by stellar evolution, star formation, and galaxy evolution can significantly affect SNR formation and the subsequent dispersal of heavy elements into the ISM.
| Participate the oral/poster presentation award competition | Yes |
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