Detached and Continuous Circumstellar Matter in Type Ibc Supernovae from Mass Eruption

Abstract

Some hydrogen-poor supernovae (SNe) are found to undergo interaction with dense circumstellar matter (CSM) that may originate from mass eruption(s) just prior to core-collapse. We model the interaction between the remaining star and the bound part of the erupted CSM that eventually fall back to the star. We find that while fallback initially results in a continuous CSM down to the star, feedback processes from the star can push the CSM to large radii of $\gtrsim 10^{15}$ cm from several years after the eruption. In the latter case, a tenuous bubble surrounded by a dense and detached CSM extending to $\gtrsim 10^{16}$ cm is expected. Our model offers a natural unifying explanation for the diverse CSM structures seen in hydrogen-poor SNe, such as Type Ibn/Icn SNe that show CSM signatures soon after explosion, and the recently discovered Type Ic SNe 2021ocs and 2022xxf ("the Bactrian") with CSM signatures seen only at late times.

6 pages, 4 Figures. To be submitted to PASJ letters in the weekend

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Cited by in corpus (5)

• The broad-lined Type-Ic supernova SN 2022xxf with extraordinary two-humped light curves
• A cosmic formation site of silicon and sulphur revealed by a new type of supernova explosion
• The carbon-rich type Ic supernova 2016adj in the iconic dust lane of Centaurus A: signatures of interaction with circumstellar hydrogen?
• Revisiting GRB 060218: new insights into low-luminosity gamma-ray bursts from a revised shock breakout model
• Can circumstellar interaction explain the strange light curve features of Type Ib/c supernovae?