Late-time H/He-poor circumstellar interaction in the type-Ic supernova SN 2021ocs: an exposed oxygen-magnesium layer and extreme stripping of the progenitor

H. Kuncarayakti, K. Maeda, L. Dessart +14

Supernova (SN) 2021ocs was discovered in the galaxy NGC 7828 ($z=0.01911$) within the interacting system Arp 144, and subsequently classified as a normal type-Ic SN around peak b…