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Practical Problems in the Analysis of CP Stars

Published online by Cambridge University Press:  12 April 2016

Charles R. Cowley  and
Sveneric Johansson
Charles R. Cowley
Affiliation:
University of Michigan
Sveneric Johansson
Affiliation:
Lunds Universitet

Abstract

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Saturation and curve-of-growth effects remain a dominant source of errors in abundance work. We suggest that the use of low noise material will enable future users to work more easily with weak lines and avoid these difficulties. The method of wavelength coincidence statistics is reviewed within the context of line identifications and abundance work. This technique is readily implemented, and should be a standard part of the analytical spectroscopy of stars. Analysis of the ultraviolet spectra of CP stars is severely handicapped by missing atomic data. Synthetic spectra are displayed showing the possible effects of hitherto unknown lines on spectra of IUE resolution.

Type
Section I - Theoretical Considerations
Information
International Astronomical Union Colloquium , Volume 90: Upper Main Sequence Stars with Anomalous Abundances , 1986 , pp. 91 - 98
Copyright
Copyright © Reidel 1986

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