Type IIb supernova progenitors by fatal common envelope evolution

Noam Lohev, Efrat Sabach, Avishai Gilkis, Noam Soker*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


From stellar evolution simulations (using MESA) we conclude that the fatal common envelope evolution (CEE) channel for the formation of Type IIb core-collapse supernova (SN IIb) progenitors can indeed account for some SNe IIb. In the fatal CEE channel for SNe IIb a low-mass main-sequence secondary star inspirals inside the giant envelope of the massive primary star and removes most of the giant envelope before it merges with the giant core. The key ingredient of the scenario studied here is that the tidally destroyed secondary star forms a new giant envelope. The mass-loss process in a wind during the evolution from the merger process until core collapse, i.e. until the explosion, leaves little hydrogen mass at explosion as inferred from observations of SNe IIb. In the case of a massive primary star with a zero-age main-sequence mass of MZAMS = 16 M that during its giant phase swallows a main-sequence star of mass M2 = 0.5 M, we find at explosion a hydrogen mass of MH 0.02–0.09 M, depending on the rotation we assume. We find similar values for MZAMS = 12 M.

Original languageEnglish
Pages (from-to)9-14
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Issue number1
StatePublished - 2019
Externally publishedYes


  • Binaries: close
  • Stars: massive
  • Supernovae: general


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