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Observations of sunspot umbral velocity oscillations

✍ Scribed by Arvind Bhatnagar; W. C. Livingston; J. W. Harvey

Publisher: Springer
Year: 1972
Tongue: English
Weight: 383 KB
Volume: 27
Category: Article
ISSN: 0038-0938
DOI: 10.1007/bf00151772

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✦ Synopsis

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 order of 0.5 km s 1.

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