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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

References

Ballesteros, E., Collados, M., Bonet, J.A., Lorenzo, F., Viera, T., Reyes, M., and Hidalgo, Rodríguez 1996, A&AS, 115, 353 Google Scholar
Bocchialini, K., and Baudin, F. 1995, A&A, 299, 893 Google Scholar
Gheonjian, L.A., Klepikov, V.Yu., and Stepanov, A.I. 1989, Hvar Obs. Bull. 13 No. 1, pp. 147 Google Scholar
Joarder, P.S., Nakariakov, V.M. and Roberts, B. 1997, Solar Phys., 176, 285 Google Scholar
Molowny-Horas, R., Oliver, R., Ballester, J.L. and Baudin, F. 1997, Solar Phys., 172, 181 CrossRefGoogle Scholar
Thompson, W.T. and Schmieder, B. 1991, A&A, 243, 501 Google Scholar
Zhang, Y., Engvold, O., and Keil, S.L. 1991, Solar Phys., 132, 63 Google Scholar