Chemical Abundance and Age in the Magellanic Clouds; with Special Reference to SN 1987A

  • M. W. Feast
Conference paper

Summary

Evidence relating to the chemical abundance of objects of known age in the Magellanic Clouds is reviewed. For ages < 2 × 108 years the mean [Fe/H] values are −0.2 (LMC) and −0.5 (SMC) where [Fe/H] is the difference between Cloud objects and similar objects in the solar neighbourhood. C and N are more deficient than this in Cloud H II regions. The relevance of these results for models for SN 1987A in the LMC is noted and recent work on this supernova is summarized. In the mean, the results show a roughly exponential increase in metal abundance with time over the last ~ 1010 years in both Clouds. The blue globular cluster NGC 330 (age 7 × 106 years, [Fe/H] = −1.4) is significantly more metal deficient than other young SMC objects suggesting it may have formed remote from them, perhaps in the Magellanic Stream.

Keywords

Globular Cluster Planetary Nebula Metal Abundance Magellanic Cloud Chemical Abundance 
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© Springer-Verlag New York, Inc. 1989

Authors and Affiliations

  • M. W. Feast
    • 1
  1. 1.South African Astronomical ObservatoryCape TownSouth Africa

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