Phase differences between luminosity and velocity measurements of the acoustic modes

✍ Scribed by A. Jiménez; M. Álvarez; N. B. Andersen; V. Domingo; A. Jones; P. L. Pallé; T. Roca Cortés

• Publisher: Springer
• Year: 1990
• Tongue: English
• Weight: 803 KB
• Volume: 126
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00158294

✦ Synopsis

With two photometric stations (Tenerife and Baja California) the luminosityp-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 behaviour 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.