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Observations of Doppler oscillations in a solar prominence

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Abstract

We report on the observation of Doppler oscillations in a quiescent limb prominence. Fourier analysis of the data reveals an oscillatory period of 7.5 min, whose phase varies linearly at 16 consecutive points (7280 km) along the slit. This yields an upper limit for the perturbation wavelength of ≈ 20000 km. Wavelet analysis confirms the above period and indicates an oscillation lifetime of 12 min. Moreover, the disturbance appears to travel at a speed greater than 4.4 km s-1. A comparison of these results with the predictions of some theoretical models is made.

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Authors and Affiliations

  1. Instituto de Astrofísica de Canarias, E-38200, La Laguna, Spain

    Roberto Molowny-Horas & Frédéric Baudin

  2. Departament de Física, Universitat de les Illes Balears, E-07071, Palma de Mallorca, Spain

    Ramón Oliver & José Luis Ballester

Authors
  1. Roberto Molowny-Horas
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  2. Ramón Oliver
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  3. José Luis Ballester
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  4. Frédéric Baudin
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Molowny-Horas, R., Oliver, R., Ballester, J.L. et al. Observations of Doppler oscillations in a solar prominence. Solar Physics 172, 181–188 (1997). https://doi.org/10.1023/A:1004922809950

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