Program: GS-2022B-Q-407

We propose to obtain late-time ‘nebular’ spectra and near-IR photometry of the nearby type Ic supernova (SN) 2022jli, located at 16 Mpc. SN 2022jli exhibits a bumpy and double-peaked light curve, implying a non-standard power mechanism. Bumps in the light curves are common among super-luminous SNe and unusual in normal luminosity core-collapse SNe such as SN 2022jli. Events displaying bumpy light curves, such as SN 2022jli, appear linked in terms of their power mechanism and their progenitors to SLSNe. The progenitors and the power mechanism that powers SLSNe is a matter of intense debate, and nearby objects such as SN 2022jli appear as the key to answer this question. The nebular phase observations of SN 2022jli will reveal the ashes of the inner core, placing constraints on the ionization state, nucleosynthesis yield and the core structure of the SN. Thus providing possibly the best constraints in the potential progenitor and on the power mechanism.