Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-30T10:30:29.787Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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

References

Adelman, S.J. 1974, Ap. J. Suppl, 28, 51.Google Scholar
Bidelman, W.P. 1966, in Abundance Determinations in Stellar Spectra., IAU Symposium 26, p. 229.Google Scholar
Bidelman, W.P. 1968, in Nucleosynthesis, ed. Arnett, W.D., Hansen, C.J., Truran, J.W., and Cameron, A.G.W. (New York: Gordon and Breach), p. 63.Google Scholar
Bord, D.J., and Davidson, J.P. 1982, Ap. J., 258, 674.CrossRefGoogle Scholar
Chjonacki, G.T., Cowley, C.R.. and Bord, D.J. 1984, Ap. J., 286, 736–746.Google Scholar
Corliss, C.H. and Bozman, W.R. 1962, N. B. S. Monograph,Google Scholar
Cowley, C.R. 1970, The Theory of Stellar Spectra, (New York: Gordon and Breach).Google Scholar
Cowley, C.R., and Adelman, S.J. 1983, Quart. Journ. Roy. Astron. Soc., 24, 393.Google Scholar
Cowley, C.R., and Arnold, C.N. 1978, Ap. J., 226, 420.CrossRefGoogle Scholar
Cowley, C.R., and Corliss, C.H. 1983, Mon. Not. Roy. Astron. Soc, 203, 651.Google Scholar
Cowley, C.R., and Hensberge, H. 1981, Ap. J., 244, 252.Google Scholar
Davidson, J.P., and Bord, D.J. 1982, Astron. Ap., 111, 362.Google Scholar
Henseberge, H., and van Rensbergen, W. 1985, A Peculiar Newsletter, Fourteenth issue, July 1.Google Scholar
Hensberge, H., Van Santvoort, J., van der Huent, K.A., and Morgan, T.H., 1986, Astron. Ap., in press.Google Scholar
Hiltner, W.A. 1945, Ap. J., 102, 438.Google Scholar
Jaschek, M., Jaschek, C., and Gonzalez, Z. 1965, Zs. f. Ap., 62, 21.Google Scholar
Johansson, S. 1978, Physica Scr., 18, 217.Google Scholar
Johansson, S. 1981, in 23rd Liège International Astrophysical Colloquium, Upper Main Sequence Chemically Peculiar Stars, (Liège: Institut d'Astrophysique), p. 229.Google Scholar
Johansson, S. 1986, in preparation.Google Scholar
Johansson, S., and Jordan, C. 1984, Mon. Not. Roy. Astron. Soc., 210, 239–256.Google Scholar
Kurucz, R.L. 1981, Smith. Ap. Obs. Spec. Rept., 390, (K-81).Google Scholar
Kurucz, R.L., and Peytremann, E. 1975, Smith. Ap. Obs. Spec. Rept., 362, (KP).Google Scholar
Leckrone, D.S. 1984, Ap. J., 286, 725.Google Scholar
Martin, W.C., Zalubas, R., and Hagen, L. 1978, Atomic Energy Levels—The Rare Earths, NBS-NSRDS, 60, (AE IV).Google Scholar
Meggers, W.F., Corliss, C.H., and Scribner, B.F. 1975, NBS Monograph, 145.Google Scholar
Merrill, P.W. 1956, Lines of the Chemical Elements in Astronomical Spectra, Carnegie Institution ofGoogle Scholar
Muthsam, H., and Cowley, C.R. 1984, Astron. and Ap.., 130, 348.Google Scholar
Unsöld, A. 1955, Physik der Sternatmosphären, 2nd Ed., (Berlin: Springer-Verlag).Google Scholar