Observational study for detecting periodic oscillations in the inner solar corona
Abstract
For the purpose of detecting periodic oscillations or waves in the inner corona, time series observations of Fe XIV λ5303 emission-line spectra were made at the Norikura Solar Observatory. Detailed line-profile analyses followed by power spectral analyses have provided the conclusion that periodic intensity fluctuations of nearly the same phase existed over some 100,000 km along the spectrograph slit with the same period of 235 s, and with the wavelength of 30,000 - 40,000 km, while no periodicity was detected both for the line width and the line-of-sight Doppler velocity.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- 1986
- Bibcode:
- 1986PASJ...38..251T
- Keywords:
-
- Periodic Variations;
- Solar Corona;
- Solar Oscillations;
- Coronal Loops;
- Emission Spectra;
- Iron;
- Line Spectra;
- Magnetohydrodynamic Waves;
- Power Spectra;
- Solar Physics