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Non-LTE Spectra of Iron Group Elements for CSPN

Published online by Cambridge University Press:  07 August 2017

S.R. Becker  and
K. Butler
S.R. Becker
Affiliation:
Universitätssternwarte München, Scheinerstraße 1, 8000 München 80, Germany
K. Butler
Affiliation:
Universitätssternwarte München, Scheinerstraße 1, 8000 München 80, Germany

Extract

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UV spectra of CSPN are dominated by lines from ions of iron group elements. Recently we have developed a non-LTE model of the Fe V spectrum putting particular emphasis on this spectral region (Becker and Butler, 1992a). Lines of Ni IV and Ni V are major contributors to blends with the dominating Fe V lines. Meanwhile, non-LTE models for Ni IV, Ni V and Ni VI have been developed (Becker and Butler, 1992b) and the non-LTE model spectra composed of lines from all four ions can be compared to the observations.

Type
II. Highlights on the Nuclei
Information
Symposium - International Astronomical Union , Volume 155: Planetary Nebulae , 1993 , pp. 84
Copyright
Copyright © Kluwer 1993 

References

Becker, S.R. and Butler, K., 1992a, A&A, in press.Google Scholar
Becker, S.R. and Butler, K., 1992b, A&A, in preparation.Google Scholar
Kudritzki, R.P., 1992a, A&A in press.Google Scholar
Kudritzki, R.P., 1992b, this book.Google Scholar
Mendez, R.H., Herrero, A. and Manchado, A., 1990, A&A, 229, 152.Google Scholar