Several lines of neutral oxygen observed at various positions on the solar disk were used to study the influence of (1) the temperature distribution, (2) the velocity field, and (3) the damping on the line profiles and the abundance of oxygen in the photosphere. Theoretical profiles were calculated
The center-to-limb wavelength shift of a number of Fraunhofer lines
β Scribed by James Charles LoPresto; A. Keith Pierce
- Publisher
- Springer
- Year
- 1985
- Tongue
- English
- Weight
- 284 KB
- Volume
- 102
- Category
- Article
- ISSN
- 0038-0938
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π SIMILAR VOLUMES
Absolute wavelengths for Fraunhofer lines are compared with laboratory measurements for several atomic and molecular spectra. The wavelength differences are shown to be consistent with the proposal that the deeper layers of the photosphere are in convective motion: ve -~ 3 km/sec for log To> --1.0.
Low noise photoelectric measurements of the line profile of the g = 0 Fe line 2 5576.097 combined with determinations of the wavelength shift of its centre calibrated by use of an 12 absorption tube are reported. Measurements taken at various limb distances (1.0 < cos ~ < 0.2) and along 4 different