Advertisement

Interpretation of the CO Bands of Supernova 1987A

  • C. M. Sharp
  • P. Höflich
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUH, volume 8)

Abstract

Model calculations for the interpretations of the CO bands in the IR are discussed. Spherical symmetry is assumed. Profiles of the physical quantities (i.e. temperature, mass, electron density, abundances, etc.) are given by NLTE models which allow for the representation of observed spectra of supernova 1987A in the optical and near infrared. C and O have to be chosen overabundant by a factor of 25 in the helium-rich layers, or a clumpy density distribution structure of a corresponding factor relative to the mean local value is needed. However, the comparison between the observed forbidden OI line at about 6300 A favours the first interpretation. A factor of about 3 has to be taken into account as uncertainty for the overabundance because of the assumptions of the background model. This implies evidence for strong mixing of the helium rich region with more central layers during the stellar evolution and/or the explosion.

Keywords

Background Model Stellar Evolution Overtone Band Progenitor Star Band Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Arnett, W.D. 1987, Astrophys. J., 319, 136.Google Scholar
  2. Danziger, I.J., Bouchet, P., Fosbury, R.A.E., Gouiffes, C.; Lucy, L.B., Moorwood, A.F.M., Oliva, E., and Rufener, F. 1987. George Mason Conference, October 1987.Google Scholar
  3. Hilldebrandt, W., Höflich, P., Truran,J.W., and Weiss, A. 1987, Nature, 327, 597.ADSCrossRefGoogle Scholar
  4. Hilldebrandt, W., Höflich, P., Janka, H.- T., and Monchmeyer, R. 1988. To appear in Proceedings of the ESO-CERN Workshop, June 1988.Google Scholar
  5. Höflich, P. 1987, in “ESO-workshop on SN1987A”, ed. I.J.Danziger, Garching, p. 447.Google Scholar
  6. Höflich, P. 1987, in “ESO-workshop on SN1987A”, ed. I.J.Danziger, Garching, p. 447.Google Scholar
  7. Nomoto, K. 1988, preprint.Google Scholar
  8. Sharp, C.M. 1988, Astron. Astrophys. Suppl. Ser. 72, 355.ADSGoogle Scholar
  9. Woosley, S.E. 1988, preprint.Google Scholar
  10. Woosley, S.E., Pinto, P.A., and Ensman, L. 1987, Astrophys.J., 324, 466.ADSCrossRefGoogle Scholar

Copyright information

© International Astronomical Union 1989

Authors and Affiliations

  • C. M. Sharp
    • 1
  • P. Höflich
    • 1
  1. 1.Institut für AstrophysikMax-Planck-Institute für Physik und AstrophysikGarchingGermany

Personalised recommendations