Variability in the Periodicity of 27 Days in Solar Indices

Details Variability in the Periodicity of 27 Days in Solar Indices Variability in the Periodicity of 27 Days in Solar Indices

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002soph..209..207k&link_type=abstract

Solar Physics, v. 209, Issue 1, p. 207-216 (2002).

Physics

9

Scientific paper

The short-term variation of solar indices, though typically near the solar rotation period of 27 days, can often deviate considerably from 27 days, in a wide range ˜ 19 33 days. The peak locations are within a day or two for all solar indices, indicating that the whole of the solar atmosphere is affected in a similar way. There are no systematic differences between the peaks of the chromosphere and the corona as such, but F10, X-rays, and coronal green line, which have uncertainties about their solar altitudes of origin, do show some differences (earlier peaks) as compared to other indices (chromospheric as well as coronal).

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