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- W4378770458 abstract "We develop a suite of 3D hydrodynamic models of supernova remnants (SNRs) expanding against the circumstellar medium (CSM). We study the Rayleigh-Taylor Instability (RTI) forming at the expansion interface by calculating an angular power spectrum for each of these models. The power spectra of young SNRs is seen to exhibit a dominant angular mode, which is a diagnostic of their ejecta density profile as found by previous studies. The steep scaling of power at smaller modes and the time evolution of the spectra is indicative of absence of a turbulent cascade. Instead, as the time evolution of the spectra suggests, they may be governed by an angular mode dependent net growth rate. We also study the impact of anisotropies in the ejecta as well as in the CSM on the power spectra of velocity and density. We confirm that perturbations in the density field (whether imposed on the ejecta or the CSM) do not influence the anisotropy of the remnant significantly unless they have a very large amplitude and form large-scale coherent structures. In any case, these clumps can only affect structures on large angular scales. The power spectra on small angular scales is completely independent of the initial clumpiness and only governed by the growth and saturation of the Rayleigh-Taylor instability." @default.
- W4378770458 created "2023-05-31" @default.
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- W4378770458 date "2023-05-26" @default.
- W4378770458 modified "2023-10-12" @default.
- W4378770458 title "A 3D Numerical Study of Anisotropies in Supernova Remnants" @default.
- W4378770458 doi "https://doi.org/10.48550/arxiv.2305.17324" @default.
- W4378770458 hasPublicationYear "2023" @default.
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