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Extreme Mass Loss in Low-mass Type Ib/c Supernova Progenitors

Wu, Samantha C. and Fuller, Jim (2022) Extreme Mass Loss in Low-mass Type Ib/c Supernova Progenitors. Astrophysical Journal Letters, 940 (1). Art. No. L27. ISSN 2041-8205. doi:10.3847/2041-8213/ac9b3d.

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Many core-collapse supernovae (SNe) with hydrogen-poor and low-mass ejecta, such as ultra-stripped SNe and type Ibn SNe, are observed to interact with dense circumstellar material (CSM). These events likely arise from the core collapse of helium stars that have been heavily stripped by a binary companion and have ejected significant mass during the last weeks to years of their lives. In helium star models run to days before core collapse we identify a range of helium core masses ≈2.5–3 M_⊙ whose envelopes expand substantially due to the helium shell burning while the core undergoes neon and oxygen burning. When modeled in binary systems, the rapid expansion of these helium stars induces extremely high rates of late-stage mass transfer (Ṁ ≳ 10⁻² M_⊙ yr⁻¹) beginning weeks to decades before core collapse. We consider two scenarios for producing CSM in these systems: either mass transfer remains stable and mass loss is driven from the system in the vicinity of the accreting companion, or mass transfer becomes unstable and causes a common envelope event (CEE) through which the helium envelope is unbound. The ensuing CSM properties are consistent with the CSM masses (∼10⁻²–1 M_⊙) and radii (∼10¹³–10¹⁶ cm) inferred for ultra-stripped SNe and several type Ibn SNe. Furthermore, systems that undergo a CEE could produce short-period neutron star binaries that merge in less than 100 Myr.

Item Type:Article
Related URLs:
URLURL TypeDescription
Wu, Samantha C.0000-0003-2872-5153
Fuller, Jim0000-0002-4544-0750
Additional Information:We thank Thomas Tauris for helpful discussion, and Pablo Marchant for guidance in implementing the corrected MT prescription. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1745301. J. Fuller acknowledges support from grant NSF AST-2205974.
Group:Astronomy Department, TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
NSF Graduate Research FellowshipDGE-1745301
Issue or Number:1
Record Number:CaltechAUTHORS:20221208-575280000.2
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:118272
Deposited By: Research Services Depository
Deposited On:10 Jan 2023 23:17
Last Modified:10 Jan 2023 23:17

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