Physics
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aspc..184..201h&link_type=abstract
Third Advances in Solar Physics Euroconference: Magnetic Fields and Oscillations, ASP Conference Series vol.184, p. 201-205. Eds
Physics
6
Solar Chromosphere, Oscillations, Lyman Lines, Soho/Sumer
Scientific paper
We discuss first observations of the temporal behaviour of the hydrogen Lyman lines made by the SUMER/SOHO spectrometer. Using the Ly 5 line, we show here the global oscillatory pattern of the whole line profile for three representative quiet-Sun structures: cell interior, network boundary, and bright network. Mean power spectra for these structures show several maxima, some of which are quite well correlated with the maxima derived from Ca II K_2V observations. In the cell interior, the power peak is centred between 4.5-5 mHz. No clear evidence of a 3 minute chromospheric mode was found. In the network, we observe a broad range of frequencies, with a maximum between 2-3 mHz. Lyman lines exhibit certain Doppler shifts and asymmetries, but the oscillatory behaviour is mainly due to the intensity variations which are small compared to the line intensity itself (they reach 10-20 % of the mean line intensity).
Curdt Werner
Heinzel Petr
No associations
LandOfFree
Chromospheric Oscillations Observed by SUMER/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 Chromospheric Oscillations Observed by SUMER/SOHO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromospheric Oscillations Observed by SUMER/SOHO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1769660