𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Solar rotation, 1966–1978

✍ Scribed by W. Livingston; T. L. Duvall

Publisher
Springer
Year
1979
Tongue
English
Weight
670 KB
Volume
61
Category
Article
ISSN
0038-0938

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✦ Synopsis

Photospheric and chromospheric spectroscopic Doppler rotation rates for the full solar disk are analyzed for the period July, 1966 to July, 1978. An approximately linear secular increase of the equatorial rate of 3.7% for these 12 years is found (in confirmation of Howard, 1976). The high latitude rates above 65 ~ appear to vary with a peak-to-peak amplitude of 8%, or more, phased to the sunspot cycle such that the most rapid rotation occurs at, or following, solar maximum. The chromosphere, as indicated by Ha, has continued to rotate on the average 3% faster than the photosphere agreeing with past observations. Sources of error are discussed and evaluated.

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