An asymptotic-giant-branch star in the progenitor system of a type Ia supernova (original) (raw)

Nature volume 424, pages 651–654 (2003) Cite this article

Abstract

Stars that explode as supernovae come in two main classes. A type Ia supernova is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in its spectrum; this class of supernova is thought to produce the majority of iron-peak elements in the Universe. They are also used as precise ‘standard candles’ to measure the distances to galaxies. While there is general agreement that a type Ia supernova is produced by an exploding white dwarf star1, no progenitor system has ever been directly observed. Significant effort has gone into searching for circumstellar material to help discriminate between the possible kinds of progenitor systems2, but no such material has hitherto been found associated with a type Ia supernova3. Here we report the presence of strong hydrogen emission associated with the type Ia supernova SN2002ic, indicating the presence of large amounts of circumstellar material. We infer from this that the progenitor system contained a massive asymptotic-giant-branch star that lost several solar masses of hydrogen-rich gas before the supernova explosion.

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Figure 1: Spectroscopic evolution of SN2002ic.

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Figure 2: Decomposition and evolution of the Hα profiles.

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Figure 3: Spectral analysis of SN2002ic.

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Figure 4: Photometric analysis of SN2002ic.

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Figure 5: Spectroscopic comparison between SN2002ic and SN1997cy.

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Acknowledgements

All the co-authors participated in gathering the observations of the supernova. M.H. noticed the presence of hydrogen emission. M.M.P. noticed spectroscopic and photometric peculiarities and put forward the idea that these could be understood as due to SN/CSM interaction. N.B.S. provided the arguments about the progenitor types. M.H., M.M.P. and N.B.S. co-wrote this Letter. M.H. is a Hubble Fellow.

Author information

Authors and Affiliations

  1. Carnegie Observatories, 813 Santa Barbara Street, Pasadena, California, 91101, USA
    Mario Hamuy, S. E. Persson & P. J. McCarthy
  2. Las Campanas Observatory, Carnegie Observatories, La Serena, Casilla, 601, Chile
    M. M. Phillips, Miguel Roth, Kevin Krisciunas & Nidia Morrell
  3. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, La Serena, Casilla, 603, Chile
    Nicholas B. Suntzeff
  4. Departamento de Astronomía, Universidad de Chile, Santiago, Casilla, 36-D, Chile
    José Maza & L. E. González
  5. University of Arizona, Steward Observatory, Tucson, Arizona, 85721, USA
    E. M. Green

Authors

  1. Mario Hamuy
  2. M. M. Phillips
  3. Nicholas B. Suntzeff
  4. José Maza
  5. L. E. González
  6. Miguel Roth
  7. Kevin Krisciunas
  8. Nidia Morrell
  9. E. M. Green
  10. P. J. McCarthy

Corresponding author

Correspondence toMario Hamuy.

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Competing interests

The authors declare that they have no competing financial interests.

Supplementary information

41586_2003_BFnature01854_MOESM1_ESM.jpg (download JPG )

Supplementary Figure 1: Direct image of SN 2002ic. V-band CCD image of SN 2002ic taken on 2002 Dec. 9 UT with the Las Campanas Observatory Swope 1-m telescope. The horizontal bar corresponds to 1 arc min. North is up and East to the left. (JPG 9 kb)

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Hamuy, M., Phillips, M., Suntzeff, N. et al. An asymptotic-giant-branch star in the progenitor system of a type Ia supernova.Nature 424, 651–654 (2003). https://doi.org/10.1038/nature01854

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