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Contribution to the observation of the photospheric oscillations

✍ Scribed by E. Fossat; G. Ricort

Publisher
Springer
Year
1973
Tongue
English
Weight
345 KB
Volume
28
Category
Article
ISSN
0038-0938

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✦ Synopsis

Observations of the 300 s photospheric oscillation on large solar surfaces (up to 5 '20" in diameter) using a sodium optical resonance cell seem to show that the power at long horizontal wavelengths is larger than previous results would indicate. In order to get more information about the spatial distribution of the energy, a new observational method has been perfected, which will allow us to obtain the spatiotemporal power spectrum.

In some of our observations, a long-period oscillation (about 40 rain) appears, with an amplitude comparable to that of the 300-s oscillation, and which seems to be correlated with the occurence of chromospheric flares.

πŸ“œ SIMILAR VOLUMES

On the powerspectrum of the photospheric
On the powerspectrum of the photospheric resonance oscillations
✍ Franz-Ludwig Deubner πŸ“‚ Article πŸ“… 1972 πŸ› Springer 🌐 English βš– 137 KB

In a recent paper ; hereafter called Paper A) the author pointed out that multiple peaks in the Fourier spectra of the 5-rain oscillations as reported by others and discussed in several theoretical papers, do not characterize the average solar atmosphere, but result from insufficient statistical sta