Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..159a&link_type=abstract
Astrophysical Journal, vol. 207, July 1, 1976, pt. 1, p. 159-166.
Astronomy and Astrophysics
Astrophysics
9
A Stars, Energy Levels, Magnetic Stars, Stellar Atmospheres, Stellar Evolution, Stellar Spectra, Absorption Spectra, Abundance, Correlation, Discontinuity, Spectrum Analysis, Tables (Data)
Scientific paper
In an attempt to explain the origin of the three well-established broad, continuous absorption features seen in many magnetic peculiar A stars, the locations of bound-free discontinuity edges were calculated for overabundant elements using known energy levels. Although line blending may be important, if bound-free discontinuities contribute to the broad continuous features, then Eu II does to the 4200-A feature while Si I does to the 6300-A feature. No candidate is found for the most commonly seen feature near 5200-A. The formation of these features is discussed in terms of a two zone radially stratified chemically inhomogeneous atmosphere.
Adelman Saul J.
Wolken Pamela R.
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