Astronomy
The radioactive light of a supernova
Follow an expanding Type Ia remnant through its first hundred days. Compare nickel mass, diffusion time and apparent brightness at different distances.
The model and its limits
A phenomenological Ni/Co heating curve multiplied by a diffusion turn-on, with homologous 10,000 km/s expansion. Not a nuclear explosion calculation or a calibrated distance-fitting pipeline. The expanding ejecta radius has a compressed display scale.
Equations used in the module
Equations L(t) = M_Ni[6.45×10³⁶e^(−t/8.8)+1.45×10³⁶e^(−t/111.3)] [1−e^(−(t/t_d)²)]; m−M = 5log₁₀(d/10 pc).
