Physics
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011soph..270..365c&link_type=abstract
Solar Physics, Volume 270, Issue 1, pp.365-383
Physics
1
Sun: Oscillations, Magnetic Fields, Sunspot Number, Corona, Rossby Waves
Scientific paper
We investigate the presence and temporal evolution of short- and intermediate-term periodicities in the daily data of sunspot numbers and coronal index for the time span from May 1996 to December 2008, which covers the entire Solar Cycle 23. The daily sunspot number data have been analyzed for the full disk, and for northern and southern hemispheres of the Sun. Using the wavelet power spectrum technique, we find a number of quasi-periodic oscillations in all the data sets. We also find a prominent period of 22 to 35 days in the high-frequency range, and detect the Rieger period of 150 to 160 days in both data sets during different phases of Cycle 23. We also detect ˜1.3 year oscillation in both sunspot and coronal index time series. In addition, we find a number of other short and mid-term periods. We discuss possible explanations of the observed periodicities in the light of previous results and existing numerical models.
Chowdhury Partha
Dwivedi Bhola N.
No associations
LandOfFree
Periodicities of Sunspot Number and Coronal Index Time Series During Solar Cycle 23 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Periodicities of Sunspot Number and Coronal Index Time Series During Solar Cycle 23, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Periodicities of Sunspot Number and Coronal Index Time Series During Solar Cycle 23 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-943208