Abstract
view Abstract Citations (7) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A non-LTE treatment of beryllium lines: misidentification of the solar Be I feature at 2650 Å. Shipman, H. L. ; Auer, L. H. Abstract The formation of beryllium lines, with particular reference to the solar Be spectrum, is investigated in a non-LTE context with a 25-level model atom in which 15 levels are allowed to depart from LTE. In some transitions, particularly the Be I 2650-A line, the non-LTE effects can be quite dramatic, changing the deduced abundances by a factor of 4. Based on the non-LTE calculations and Copernicus observations of other stars, it is found that a solar spectral feature at 2650 A, previously identified by numerous investigators as a Be I line, cannot be produced by Be I. Non-LTE effects on the Be II 3131-A line, used for most Be abundance determinations in the literature, are small by comparison. Publication: The Astronomical Journal Pub Date: November 1979 DOI: 10.1086/112605 Bibcode: 1979AJ.....84.1756S Keywords: Abundance; Beryllium; Line Spectra; Nonequilibrium Thermodynamics; Satellite Observation; Solar Spectra; Atomic Energy Levels; Atomic Spectra; Electron Transitions; Oao 3; Spaceborne Astronomy; Astrophysics; Beryllium:Solar Spectrum; Line Formation:Solar Spectrum full text sources ADS | data products SIMBAD (3)
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