Examining The Hydrodyamics of High Energy Stellar Explosions and Their Outflows
Open AccessThe diversity of stellar explosions offers a wide range of probes into areas such as stellar evolution, compact object formation, high-energy physics, relativity, galaxy evolution, and cosmic-ray acceleration. Massive stars spend their lifetimes sculpting the circumstellar environment with outflows from stellar winds and other mass-loss episodes. The exact nature of the progenitor star determines these outflows, and the outflows in turn modify the behavior of the resulting supernova (SN) and supernova remnant (SNR). SNe cover a large range of objects from those that still have a significant fraction of the outer hydrogen envelope intact by the time of stellar explosion, to SNe that have lost large amounts of their outer hydrogen and helium by that time. In rare cases, stripped envelope SNe result in high-energy collimated outflows, known as long gamma-ray bursts (GRBs), which also interact with the circumstellar medium and produce emission known as the GRB afterglow.The multitude of potential progenitors creates a challenge for accurately characterizing the nature of the explosion and interpreting the observed behavior. The modeling of stellar explosions allows for the determination of the micro- and macrophysics behind the observed phenomena, as well as the evolution of the progenitor object. It also allows for determining the impact these objects have on the composition and dynamics of the surrounding interstellar medium. In order to better extract information about these progenitor systems and their environment, we model the radiative output from these explosions based on physical models of the dynamics coupled with detailed descriptions of the radiation mechanisms. We seek to understand these systems as a class of objects by examining how the potential input parameters modify the time evolution of the emission, and what observables can be used for model differentiation.
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Jacovich_gwu_0075A_15774.pdf | 2022-03-06 | Open Access |
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