Spectroscopic observations of progenitor activity 100 days before a Type Ibn supernova
Spectroscopic observations of progenitor activity 100 days before a Type Ibn supernova
Obtaining spectroscopic observations of the progenitors of core-collapse supernovae is often unfeasible, due to an inherent lack of knowledge as to what stars experience supernovae and when they will explode. In this Letter we present photometric and spectroscopic observations of the progenitor activity of SN 2023fyq before the He-rich progenitor …