Phase differences between luminosity and velocity measurements of the acoustic modes

Details Phase differences between luminosity and velocity measurements of the acoustic modes Phase differences between luminosity and velocity measurements of the acoustic modes

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..126....1j&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 126, March 1990, p. 1-19. Research supported by CICYT.

Physics

Optics

19

Acoustic Velocity, Helioseismology, Solar Velocity, Velocity Measurement, Acousto-Optics, Phase Deviation, Stellar Luminosity

Scientific paper

With two photometric stations (Tenerife and Baja California) the luminosity p-mode spectrum at different wavelengths has been identified. After a coherence analysis between data from both stations to verify the solar origin of the peaks identified in luminosity, a comparative study with simultaneous velocity measurements (obtained at Tenerife only) has also been made. As a result the frequency dependence of the phase difference between luminosity and velocity p-modes has been obtained that is interpreted in terms of a nonadiabatic behavior of the solar atmosphere. The amplitude ratios between luminosity and velocity p-modes have also been obtained. All these results are compared with theoretical expectations.

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