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Nonlinear growth of Rayleigh-Taylor instabilities and mixing in SN 1987A

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Numerical simulation demonstrates nonlinear growth of instabilities in SN 1987A, suggesting significant mixing.

This study aims to explore the nonlinear growth of Rayleigh-Taylor instabilities during the explosion of SN 1987A.
Used a two-dimensional hydrodynamic code for numerical simulations.
Analyzed light curves and emission lines to assess large-scale mixing.
Confirmed findings through comparisons with previous stability analyses and simulations.
Nonlinear growth of Rayleigh-Taylor instabilities was observed at the H/He interface shortly after the explosion.
Core material mixed into layers with expansion velocities of approximately 2200 km/s.
Hydrogen was driven down to the core with an expansion velocity of about 800 km/s, creating high-density fingers.

Hachisu et al. (1990) studied this question.

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