SN2025aico Data Show Limited 56Ni Mixing and Ejecta Asymmetry in Type IIb Event
SN2025aico provides rare continuous optical-NIR-MIR coverage that links limited 56Ni mixing, ejecta asymmetry, and in-situ dust formation in a single Type IIb event. The velocity upturn in helium lines and double-peaked profiles after +100 days point to explosion dynamics tied to core-collapse delay times. The findings underscore the diagnostic power of sustained multi-wavelength follow-up for connecting progenitor evolution to explosion physics.
Future multi-epoch JWST or ground-based MIR monitoring through day +300 would test whether the carbon dust mass grows or is destroyed by the reverse shock, directly constraining dust yields from core-collapse events. Polarimetry or high-resolution integral-field spectroscopy could map the three-dimensional geometry and confirm whether the asymmetry is global or confined to the helium shell.
Davis et al.: Carbon dust mass will increase by at least 30 percent between +150 and +300 days if in-ejecta formation dominates over destruction.
Sources (2)
- [1]Primary Source(https://arxiv.org/abs/2609.26935)
- [2]Supporting Source(https://arxiv.org/abs/2205.02239)