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Umbral intensities of large sunspots

โœ Scribed by G. Ekmann; P. Maltby

Publisher
Springer
Year
1974
Tongue
English
Weight
243 KB
Volume
35
Category
Article
ISSN
0038-0938

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๐Ÿ“œ SIMILAR VOLUMES

The intensity of the penumbra of large s
The intensity of the penumbra of large sunspots
โœ P. Maltby; N. Mykland ๐Ÿ“‚ Article ๐Ÿ“… 1969 ๐Ÿ› Springer ๐ŸŒ English โš– 359 KB

Simultaneous photoelectric observations of sunspot penumbrae at 5790, 6690, 8760 and 16700~ are presented. No change in penumbral intensity from spot to spot is found in a sample of 11 large sunspots.

Observations of sunspot umbral velocity
Observations of sunspot umbral velocity oscillations
โœ Arvind Bhatnagar; W. C. Livingston; J. W. Harvey ๐Ÿ“‚ Article ๐Ÿ“… 1972 ๐Ÿ› Springer ๐ŸŒ English โš– 383 KB

Sunspot umbral molecular lines have been used to look for the oscillatory velocities in the umbra. Power spectrum analysis showed conspicuous power for periods in the range between 448 and 310 s. The maximum peak-to-peak amplitude of the umbral oscillatory velocity component is observed to be in the

The relation between the intensities of
The relation between the intensities of umbra and penumbra of large sunspots
โœ G. Ekmann ๐Ÿ“‚ Article ๐Ÿ“… 1974 ๐Ÿ› Springer ๐ŸŒ English โš– 160 KB

Abstsact. Based on pinhole photometer observations in 4-6 wavelength regions 'gee have searched for a connection between the intensities of the umbra and the penumbra of sunspots. For the 1.67 pm wavelength region it is apparent that spots with dark umbrae also have dark penumbrae. In the other wave