Other
Scientific paper
Dec 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..169l&link_type=abstract
In ESA, Seismology of the Sun and Sun-Like Stars p 169-173 (SEE N89-25819 19-92)
Other
1
Infrared Radiation, Solar Corona, Solar Instruments, Solar Oscillations, Solar Radiation, Chromosphere, Photometers, Solar Spectra, Stellar Spectrophotometry
Scientific paper
The 5-min solar oscillations are found to be easily observable as intensity variations in an infrared wavelength band centered at 2.23 micron with bandwidth (FWHM) 65 nm. The observed peak to peak intensity variation is 2.4 percent for a circular aperture of 1 arc min and 0.8 percent in the full disk observations, i.e., considerably higher than in the other 4 observed channels between 0.67 and 1.65 microns. In addition to the 5-min oscillation the observed full disk power spectrum shows a strong feature centered at 4.3 mHz. This frequency coincides with that of the fundamental p-mode resonance of the chromosphere. Although this identification is not proved, the possibility to study the chromospheric cavity in full disk observations is interesting.
Leifsen Torben
Maltby Per
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