An observational search for solar pulsations at periods from 7 to 70 minutes

Details An observational search for solar pulsations at periods from 7 to 70 minutes An observational search for solar pulsations at periods from 7 to 70 minutes

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..265d&link_type=abstract

Astrophysical Journal, Part 1, vol. 224, Aug. 15, 1978, p. 265-275. Research supported by the Max C. Fleischmann Foundation

Physics

8

Atmospheric Physics, Periodic Variations, Solar Atmosphere, Solar Physics, Velocity Distribution, Fast Fourier Transformations, Power Spectra

Scientific paper

Results are reported for measurements of the large-scale solar velocity field performed by comparing Doppler shifts from the disk center and limb with the aid of the magnetically insensitive Fe I line at 5123.730 A. Average power spectra are plotted, but no statistically significant periodicities are found at periods between 7 and 70 min. The sensitivities of the present observations and those of Hill et al. (1976) are compared, and the temperature change for an oscillation in the sun's atmosphere is calculated using the HSRA. It is concluded that the statistical significance and solar origin of the peaks in the SCLERA power spectrum are not well established and that the reality of the solar pulsations reported by Hill et al. is questionable.

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