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High Frequency Signal in Golf Data

Published online by Cambridge University Press:  08 February 2017

R.A. García ,
P.L. Pallé  and
The GOLF Team
R.A. García
Affiliation:
SAp, DAPNIA/DSM, CE Saclay, 91191 France
P.L. Pallé
Affiliation:
Instituto de Astrofisica de Canarias, E-38205, Tenerife, Spain

Abstract

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The analysis of ≈ 460 days of high quality data provided by the GOLF experiment on board SOHO, has unambiguously revealed the presence of signal in the power spectrum in the region 5.8 to 7.5 mHz, well above the p-modes cut-off frequency. In this contribution, the observed structure of these full-disk observations is presented. High frequency peaks (hereafter HFPs) well above the acoustic cutoff frequency of the solar p modes (≈ 5.5 mHz) have been already observed in intermediate and high spatial resolution oscillation data (Duvall et al. 1991). The different interpretations of the observed pattern (Kumar 1994 and references therein; Rast and Gough 1995) agree that it provides direct information on the location and some characteristics of the source of the acoustic oscillations (see also Vorontsov et al. 1997).

Type
VII. The Solar Atmosphere
Information
Symposium - International Astronomical Union , Volume 185: New Eyes to See Inside the Sun and Stars , 1998 , pp. 447 - 448
Copyright
Copyright © Kluwer 1998 

References

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Vorontsov, S.V., Jefferies, S.M., Duvall, T.L. Jr. and Harvey, H. (1997), MNRAS Submitted Google Scholar