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On the Origin of the Abundance Anomalies in IK Peg

  • B. Smalley
  • K. C. Smith
  • D. Wonnacott
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 208)

Abstract

IK Peg is a binary system comprising a pulsating A-type star in orbit with a massive white dwarf. A detailed abundance analysis of IK Peg A has been performed. It is found that the Ca and Sc abundances are approximately solar, and the Fe-group elements slightly enhanced. IK Peg is not a classical Am star but the results are not inconsistent with its spectroscopic classification as a marginal Am star. An excess of Ba and Sr are found. These anomalies could be explained by radiative diffusion processes operating in the atmosphere of IK Peg A, even though it is undergoing small-amplitude pulsations. Alternatively, since the companion is a massive white dwarf, these anomalies could be the result of mass transfer during the common envelope phase of the binary system’s evolution.

Keywords

White Dwarf Radiative Diffusion Cataclysmic Variable Common Envelope Abundance Analysis 
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.

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • B. Smalley
    • 1
  • K. C. Smith
    • 2
  • D. Wonnacott
    • 3
  1. 1.Dept of PhysicsKeele UniversityStaffordshireUK
  2. 2.Dept of Physics & AstronomyUCLLondonUK
  3. 3.MSSLHolmbury St. MaryDorking, SurreyEngland

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