SN 2025aico is a low-luminosity Type IIb from a compact He star (M_env≈0.01 M⊙, R_env≈6–10 R⊙) with M_Ni≈0.033 M⊙, M_ej≈2.8 M⊙ and weak-to-moderate 56Ni mixing.
Instabilities and Mixing in SN 1993J
1 Pith paper cite this work, alongside 51 external citations. Polarity classification is still indexing.
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abstract
Rayleigh-Taylor (R-T) instabilities in the explosion of SN 1993J are investigated by means of two-dimensional hydrodynamical simulations. It is found that the extent of mixing is sensitive to the progenitor's core mass and the envelope mass. Because the helium core mass (3 - 4 \ms) is smaller than that of SN 1987A, R-T instabilities at the He/C+O interfaces develop to induce a large scale mixing in the helium core, while the instability is relatively weak at the H/He interface due to the small envelope mass. The predicted abundance distribution, in particular the amount of the \ni~ mixing, is compared with those required in the theoretical light curves and the late time optical spectra. This enables us to specify the progenitor of SN 1993J in some detail.
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SN 2025aico: Early observations of a faint Type IIb supernova with a low-mass envelope
SN 2025aico is a low-luminosity Type IIb from a compact He star (M_env≈0.01 M⊙, R_env≈6–10 R⊙) with M_Ni≈0.033 M⊙, M_ej≈2.8 M⊙ and weak-to-moderate 56Ni mixing.