Recent Skylab observations about the bright points in the solar X-ray images seem to confirm an essential prediction of a model proposed by this author for the appearance and the disappearance of the photospheric fields during a solar cycle. The segments of the individually rising strands of the 'f
CaIIK bright points and the solar cycle
โ Scribed by K. R. Sivaraman
- Publisher
- Springer
- Year
- 1984
- Tongue
- English
- Weight
- 202 KB
- Volume
- 94
- Category
- Article
- ISSN
- 0038-0938
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โฆ Synopsis
We have made number counts of the bright points that populate the interior of the Ca II network in the solar chromosphere for four solar cycles. We find that the number of these fine structures during the solar maximum exceeds that during the minimum phase on an average by 30%. The contribution due to this excess number would need to be taken into account while explaining the variation in the Ca II K emission profiles of the integrated sunlight from the solar minimum to the maximum.
๐ SIMILAR VOLUMES
On spectrograms of the K line at quiet regions of the Sun, bright threads visible in the real continuum due to the granulations are also seen in the outer wing as far as I A21 ~ 3/~ from the line centre. At the inner wing (3 ~ > I A21 > 0.5 ~) bright threads are also seen, but their spatial distrib
X-ray images obtained during two rocket flights near the maximum of sunspot cycle 21 now allow the study of the variation of X-ray bright point number over an eleven-year period covering the maxima of the last two cycles. The new data are consistent with the earlier conclusion that the temporal vari