๐”– Bobbio Scriptorium
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OBSERVATIONS OF SUNSPOT UMBRAL OSCILLATIONS

โœ Scribed by T. Horn; J. Staude; V. Landgraf

Book ID
110217208
Publisher
Springer
Year
1997
Tongue
English
Weight
541 KB
Volume
172
Category
Article
ISSN
0038-0938

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๐Ÿ“œ SIMILAR VOLUMES

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

Sunspot umbral oscillations in Mgiik
Sunspot umbral oscillations in Mgiik
โœ Joseph B. Gurman ๐Ÿ“‚ Article ๐Ÿ“… 1987 ๐Ÿ› Springer ๐ŸŒ English โš– 853 KB

Time series observations of the profile of the Mgn k line 22795.52 have been obtained in five sunspots with the Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission. The three sunspots with umbrae larger than the 3" x 3" pixel size show significant oscillations in integrated

The spectrum of umbral oscillations of t
The spectrum of umbral oscillations of the Scheuer-Thomas sunspot model
โœ V. I. Zhukov; V. I. Efremov; B. T. Nuraliev ๐Ÿ“‚ Article ๐Ÿ“… 1987 ๐Ÿ› Springer ๐ŸŒ English โš– 232 KB

Proper periods are calculated for oscillations of an isothermal gaseous layer with a homogeneous vertical magnetic field, limited by two rigid horizontal boundaries. The obtained results are in good agreement with the observed umbral oscillations in a sunspot.