Application of a new observational strategy to the study of gravitational solar modes

Martin Mateos, I.; Palle, P. L.
Bibliographical reference

International Astronomical Union. Symposium no. 185. New Eyes to See Inside the Sun and Stars, edited by Franz-Ludwig Deubner, Joergen Christensen-Dalsgaard, and Don Kurtz. Kyoto, Japan, 18-22 August, 1997, p. 51.

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0
1998
Number of authors
2
IAC number of authors
2
Citations
2
Refereed citations
2
Description
The aim of the present work is the detection of solar g-modes, making use of their spatial and temporal properties, by means of a new observational strategy. The basic data, gathered at the Observatorio del Teide in 1993, consists on daily solar velocity measurements taken continuous and sequentially at six different and symmetric positions on the solar disk. By correlating the time series resulting of the reduction process, from different positions and considering the geometrical properties of different modes (l,m) on the Sun's surface, some of them can selectively be eliminated of enhanced. Moreover the main spectral features present in the resulting power spectra must have precise phase relations if they correspond to global solar g-modes. The severe constraints that the above properties established, have been applied to the best observational obtained series (summer 1993). As a result, a discrete series of peaks have been selected that fulfill all the imposed conditions, and therefore they can be interpreted as being of solar origin.