JWST Nebular Spectroscopy of SN 2023qov: Circumstellar Dust Emission in a Normal Type Ia Supernova
JWST observations of SN 2023qov revealed a cooling dust continuum emission, the first spectroscopic detection of dust in a normal Type Ia supernova. This suggests circumstellar dust, not freshly formed material, powers the infrared light echo and challenges theories about pristine supernova environments.