New wavelengths for astronomical spectroscopy - Application to AP stars

Details New wavelengths for astronomical spectroscopy - Application to AP stars New wavelengths for astronomical spectroscopy - Application to AP stars

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..420c&link_type=abstract

Astrophysical Journal, Part 1, vol. 226, Dec. 1, 1978, p. 420-426. NSF-supported research.

Astronomy and Astrophysics

Astrophysics

18

A Stars, Astronomical Spectroscopy, Stellar Spectra, Wavelengths, Abundance, Chromium, Iron, Uranium

Scientific paper

Many of the strong unidentified lines in Ap stars such as HR 4816, which are not especially rich in rare earths, may be identified with predicted lines of first and second spectra of iron-peak elements, notably of chromium. The wavelength tables of Kurucz and Peytremann are shown to provide the basis for a significant breakthrough in line identification and abundance work. A selected region from the spectrum of HR 4816 is discussed, and it is shown that most of the strong previously unidentified lines may be satisfactorily explained. Numerous spectroscopic conundrums are shown to be resolved by the presence of blends. Although many of these lines are absent from laboratory wavelength lists, their strengths may be predicted from the Kurucz-Peytremann semiempirical gf-values.

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