The death of massive stars – I. Observational constraints on the progenitors of Type II-P supernovae

By S. Smartt, J. Eldridge, R. M. Crockett, J. R. M. Q. U. B. IoA, Cambridge Dark Cosmology Centre, Copenhagen. 2008

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The progenitors of many type II core-collapse supernovae have now been identified directly on pre-discovery imaging. Here we present an extensive search for the progenitors of type Ibc supernovae in all available pre-discovery imaging since 1998. There are 12 type Ibc supernovae with no detections of progenitors in either deep ground-based or Hubble Space Telescope archival imaging. The deepest absolute BV R magnitude limits are between 4 m and 5 m . We compare these limits with the observed Wolf-Rayet population in the Large Magellanic Cloud and estimate a 16 per cent probability we have failed to detect such a progenitor by chance. Alternatively the progenitors evolve significantly before core-collapse or we have underestimated the extinction towards the progenitors. Reviewing the relative rates and ejecta mass estimates from lightcurve modelling of Ibc SNe, we find both incompatible with Wolf-Rayet stars with initial masses > 25M⊙being the only progenitors. We present binary evolution models that fit these observational constraints. Stars in binaries with initial masses . 20M⊙lose their hydrogen envelopes in binary interactions to become low mass helium stars. They retain a low mass hydrogen envelope until � 10 4 years before core-collapse; hence it is not surprising that galactic analogues have been difficult to identify.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/df14ae0ce22dc9ba51fff1d32d00293f1309c50c

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In Astronomy and Astrophysics

  1. S. Smartt
  2. Stan Woosley
  3. N. Smith
  4. E. Berger
  5. A. Filippenko
  6. N. Langer
  7. Hans-Thomas Janka
  8. C. Conroy

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