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Infrared Doppler Oscillations in a Solar Filament

Published online by Cambridge University Press:  12 April 2016

R. Molowny-Horas ,
R. Oliver ,
J.L. Ballester  and
F. Baudin
R. Molowny-Horas
Affiliation:
Observatoire de Paris, Section de Meudon, 5 Place Janssen, F-92195 Meudon, France
R. Oliver
Affiliation:
Departament de Física, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain
J.L. Ballester
Affiliation:
Departament de Física, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain
F. Baudin
Affiliation:
National Solar Observatory, National Optical Astronomy Observatory, P.O. Box 26732, Tucson, AZ 85726, USA

Abstract

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We present the results of a high spatial resolution investigation of Doppler oscillations in a solar filament, using the He I 10830Å infrared line. Fourier power spectra of Doppler shifts reveal the presence of periodic signals. Two features, showing oscillations at 2.7 min and 12.5 min, have been studied. The use of the so-called wavelet analysis enables us to estimate the size of both features at 2.7 arc sec and 4.75 arc sec, respectively. Their approximate lifetimes are 10 min and 20 min.

Information

Type
Filaments and Their Environment
Information
International Astronomical Union Colloquium , Volume 167: New Perspectives on Solar Prominences , 1998 , pp. 139 - 142
Copyright
Copyright © Astronomical Society of the Pacific 1998

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