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  1. Journal of Astrophysics and Astronomy
  2. Journal of Astrophysics and Astronomy : Volume 28
  3. Journal of Astrophysics and Astronomy : Volume 28, Issue 2-3, September 2007
  4. Activity cycle of solar filaments
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Journal of Astrophysics and Astronomy : Volume 38
Journal of Astrophysics and Astronomy : Volume 37
Journal of Astrophysics and Astronomy : Volume 36
Journal of Astrophysics and Astronomy : Volume 35
Journal of Astrophysics and Astronomy : Volume 34
Journal of Astrophysics and Astronomy : Volume 33
Journal of Astrophysics and Astronomy : Volume 32
Journal of Astrophysics and Astronomy : Volume 31
Journal of Astrophysics and Astronomy : Volume 30
Journal of Astrophysics and Astronomy : Volume 29
Journal of Astrophysics and Astronomy : Volume 28
Journal of Astrophysics and Astronomy : Volume 28, Issue 4, December 2007
Journal of Astrophysics and Astronomy : Volume 28, Issue 2-3, September 2007
Cosmology and cosmogony in a cyclic universe
Some doubts on the validity of the foreground Galactic contribution subtraction from microwave anisotropies
Effects of the size of cosmological N-body simulations on physical quantities — II: Halo formation and destruction rate
On surface tension for compact stars
Does Si play a role in the formation of extrasolar planet systems?
Activity cycle of solar filaments
Forbidden transition probabilities of astrophysical interest among low-lying states of V III
Journal of Astrophysics and Astronomy : Volume 28, Issue 1, March 2007
Journal of Astrophysics and Astronomy : Volume 27
Journal of Astrophysics and Astronomy : Volume 26
Journal of Astrophysics and Astronomy : Volume 25
Journal of Astrophysics and Astronomy : Volume 24
Journal of Astrophysics and Astronomy : Volume 23
Journal of Astrophysics and Astronomy : Volume 22
Journal of Astrophysics and Astronomy : Volume 21
Journal of Astrophysics and Astronomy : Volume 20
Journal of Astrophysics and Astronomy : Volume 19
Journal of Astrophysics and Astronomy : Volume 18

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Activity cycle of solar filaments

Content Provider Springer Nature Link
Author Li, K. J. Li, Q. X. Gao, P. X. Mu, J. Chen, H. D. Su, T. W.
Copyright Year 2007
Abstract Long-term variation in the distribution of the solar filaments observed at the Observatorie de Paris, Section de Meudon from March 1919 to December 1989 is presented to compare with sunspot cycle and to study the periodicity in the filament activity, namely the periods of the coronal activity with the Morlet wavelet used. It is inferred that the activity cycle of solar filaments should have the same cycle length as sunspot cycle, but the cycle behavior of solar filaments is globally similar in profile with, but different in detail from, that of sunspot cycles. The amplitude of solar magnetic activity should not keep in phase with the complexity of solar magnetic activity. The possible periods in the filament activity are about 10.44 and 19.20 years. The wavelet local power spectrum of the period 10.44 years is statistically significant during the whole consideration time. The wavelet local power spectrum of the period 19.20 years is under the 95% confidence spectrum during the whole consideration time, but over the mean red-noise spectrum of α = 0.72 before approximate Carrington rotation number 1500, and after that the filament activity does not statistically show the period. Wavelet reconstruction indicates that the early data of the filament archive (in and before cycle 16) are more noiseful than the later (in and after cycle 17).
Starting Page 147
Ending Page 156
Page Count 10
File Format PDF
ISSN 02506335
Journal Journal of Astrophysics and Astronomy
Volume Number 28
Issue Number 2-3
e-ISSN 09737758
Language English
Publisher Springer-Verlag
Publisher Date 2007-10-26
Publisher Institution Indian Academy of Sciences
Publisher Place India
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Sun: activity filaments active cycle Astrophysics Astronomy
Content Type Text
Resource Type Article
Subject Astronomy and Astrophysics Space and Planetary Science
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