Calculations are made for the center-limb variations of the K2 and Kz components of the solar Ca Ii K line using an optically thick model of the chromosphere. The center-limb variations are shown to require an increase of Doppler width with height in the chromosphere and to depend critically upon th
Emission cores in H and K lines
β Scribed by R. Grant Athay
- Publisher
- Springer
- Year
- 1970
- Tongue
- English
- Weight
- 368 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0038-0938
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β¦ Synopsis
Enhancement of the violet K2 emission peak results when the atmospheric layers at heights where Ka forms are moving downward with velocities of 10-20 km/sec or when the K2 layers and those immediately below are moving upward with velocities of 3-7 km/sec. Evidence favoring the former alternative is cited.
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Emission core widths of K Ca H line in the umbra and penumbra of 9 sunspots and in their vicinity are measured. All sunspots are located near the solar disc center. Data on variation of widths Wt~ along the 'mean' sunspot radius are obtained. Values W~ in the umbra and penumbra centers are equal or
In this paper we present and analyze new data on the cores of the H and K lines of ionized calcium in the spectrum of integrated sunlight. The intensities of the components n2v, H3, HEr, KEy, K3, and K2r in the line cores were measured in terms of the continuum intensity at 4000 ~ during a solar rot
We compare microphotometer intensity traces perpendicular to dispersion in simultaneous spectrograms of good spatial resolution traced at various A2's in each of the lines. Cross correlations between the different traces show the following: (a) For each A2~ there is a corresponding A2bl at which the