Some Peculiarities of Intensity Oscillations in Ca II Lines under Coronal Holes
DOI: 10.1007/s11207-009-9503-x
Bibcode: 2010SoPh..262...53T
Teplitskaya, R. B.; Turova, I. P.; Ozhogina, O. A.
Russia
Abstract
Observations of the central intensity of the Ca II K and 849.8 nm lines are used to derive the ratios of the oscillation power in the frequency ranges of the "five-minute" (W5) and "three-minute" (W3) oscillations. It is shown that at high significance level ratios, (W5/W3) >1 at coronal hole bases, and W5/W3 ≈1 in quiet chromospheric areas far from holes.
2010
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Solar Physics
SOHO
5