New thresholds for ground-based photometry of solar intensity oscillations

Details New thresholds for ground-based photometry of solar intensity oscillations New thresholds for ground-based photometry of solar intensity oscillations

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..189c&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 189-193 (SEE N89-25819 19-92)

Physics

2

Solar Oscillations, Solar Radiation, Stellar Spectrophotometry, Sun, Ground Stations, Solar Spectra, Space Observations (From Earth), Spectrum Analysis

Scientific paper

The analysis of new whole-disk intensity observations realized from Pic-du-Midi and Jungfraujoch (France, Switzerland) reveals the presence of the solar p-modes. With a 10 hr (single day) integration time and a 10 nm optical bandpass, the resolved groups of modes show a peak amplitude between 0.00001 (red channel) and 0.00003 (blue channel), while the observed background noise power is of the order of 0.000001/Hz at 3 mHz. A cross-spectrum analysis was applied to solar data. The less than optimum data available prevent any firm conclusions. Considering the possibility to transpose this technique to stars, intensity oscillations of solar-like stars are within reach of ground-based instruments, assuming atmospheric transparency fluctuations as low as those encountered in the present work.

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