SN 2018ijp: the explosion of a stripped-envelope star within a dense H-rich shell?

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 signat...

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Veröffentlicht in:Astron.Astrophys 2021-06, Vol.650, p.A174
Hauptverfasser: Tartaglia, L., Sollerman, J., Barbarino, C., Taddia, F., Mason, E., Berton, M., Taggart, K., Bellm, E. C., De, K., Frederick, S., Fremling, C., Gal-Yam, A., Golkhou, V. Z., Graham, M., Ho, A. Y. Q., Hung, T., Kaye, S., Kim, Y.-L., Laher, R. R., Masci, F. J., Perley, D. A., Porter, M. D., Reiley, D. J., Riddle, R., Rusholme, B., Soumagnac, M. T., Walters, R.
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Sprache:eng
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Zusammenfassung: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.
ISSN:0004-6361
1432-0746
1432-0746
DOI:10.1051/0004-6361/202039068