학술논문
SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?⋆⋆⋆
Document Type
article
Author
Tartaglia, L; Sollerman, J; Barbarino, C; Taddia, F; Mason, E; Berton, M; Taggart, K; Bellm, EC; De, K; Frederick, S; Fremling, C; Gal-Yam, A; Golkhou, VZ; Graham, M; Ho, AYQ; Hung, T; Kaye, S; Kim, Y-L; Laher, RR; Masci, FJ; Perley, DA; Porter, MD; Reiley, DJ; Riddle, R; Rusholme, B; Soumagnac, MT; Walters, R
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Subject
Language
Abstract
In this paper, we discuss the outcomes of the follow-up campaign of SN 2018ijp, discovered as part of the Zwicky Transient Facility survey for optical transients. Its first spectrum shows similarities to broad-lined Type Ic supernovae around maximum light, whereas later spectra display strong signatures of interaction between rapidly expanding ejecta and a dense H-rich circumstellar medium, coinciding with a second peak in the photometric evolution of the transient. This evolution, along with the results of modeling of the first light-curve peak, suggests a scenario where a stripped star exploded within a dense circumstellar medium. The two main phases in the evolution of the transient could be interpreted as a first phase dominated by radioactive decays, and a later interaction-dominated phase where the ejecta collide with a pre-existing shell. We therefore discuss SN 2018jp within the context of a massive star depleted of its outer layers exploding within a dense H-rich circumstellar medium.