Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO

Details Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mwoc.conf...19b&link_type=abstract

Multi-Wavelength Observations of Coronal Structure and Dynamics -- Yohkoh 10th Anniversary Meeting. Proceedings of the conferenc

Computer Science

Scientific paper

We examine spectral time series of the coronal line Mg ix 368Å, the transition region line O v 629Å, and the chromospheric line He i 584Å observed during several periods of 2000, with the Coronal Diagnostic Spectrometer (CDS) onboard the SoHO spacecraft. We study different parts of coronal holes, plumes and inter-plumes (off-limb) as a separate study. We report here on a time series analysis, using wavelet methods, of small individual regions in the polar coronal hole. The wavelet analysis allows us to derive the duration as well as the periods of the oscillations. The statistical significance of the oscillations was estimated by using a randomisation method. Our observations indicate the presence of compressional waves with periods of 20-30 minutes or longer. These slow magneto-acoustic waves may provide enough energy flux for the acceleration of the fast solar wind.

Affiliated with

Also associated with

No associations

Rating

Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO 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 Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-Period Oscillations in Polar Coronal Holes as Observed by CDS on SOHO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1838215