SOHO/CDS observations of waves above the network

Details SOHO/CDS observations of waves above the network SOHO/CDS observations of waves above the network

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...448.1169g&link_type=abstract

Astronomy and Astrophysics, Volume 448, Issue 3, March IV 2006, pp.1169-1175

Astronomy and Astrophysics

Astrophysics

9

Sun: Atmosphere, Sun: Oscillations

Scientific paper

We analyze temporal variations in the intensities and the Doppler shifts of He i 584.33 Å (chromosphere), O v 629.73 Å (transition region), and Mg ix 368.07 Å (corona) measured in and above chromospheric network near disk center with the Coronal Diagnostic Spectrometer (CDS) onboard the Solar and Heliospheric Observatory (SOHO). There is significant correlation between the He i and O v modulations, with O v intensity leading He i intensity by 27.3 s ± 4.6 s but no significant time shift in the Doppler shift. Cross-correlation between the O v and Mg ix intensities reveals multiple maxima without correlation between their Doppler shifts. Wavelet power analysis gives evidence of intermittent chromospheric and transition-region oscillations with periodicities in the 250-450 s range and of coronal oscillations in the 110-300 s range. Wavelet phase difference analysis shows that the determined time shift between variations of the He i and O v intensities is dominated by waves with about 300 s periodicity. We interpret these results as giving evidence of compressive waves that propagate downward from the transition region to the chromosphere in the particular chromospheric network. We discuss different scenarios regarding origin and source localization of waves, and we speculate on their role in coronal heating above chromospheric network.

Affiliated with

Also associated with

No associations

Rating

SOHO/CDS observations of waves above the network 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 SOHO/CDS observations of waves above the network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SOHO/CDS observations of waves above the network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1579197