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Astron. Astrophys. 322, L41-L44 (1997)

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Letter to the Editor

Observation of solar low-l p-modes by the CORONAS-DIFOS experiment

K.-H. Hasler 1, Y.D. Zhugzhda 2, N.I. Lebedev 2, R. Arlt 1 and V.N. Oraevsky 2

1 Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany
2 Inst. of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Acad. of Sc., Troitsk, Moscow Region, 142092 Russia

Received 23 January 1997 / Accepted 22 April 1997


The CORONAS satellite, launched on 1994 March 2, carried the DIFOS experiment to observe irradiance fluctuations due to global solar oscillations. The DIFOS experiment was working for almost 50 days near solar activity minimum. We present first results of the Fourier analysis of the full time series. The fine structure of the low-l p-modes is shown and fitted with Lorentzian line profiles. Results of the wavelet analysis show strong variations of the p-modes in time.

Key words: Sun: oscillations - Instrumentation: photometers - Methods: data analysis

Send offprint requests to: K.-H. Hasler


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© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998