Multiresolution wavelet analysis of SUMER/SOHO observations in a solar prominence

BLANCO, S.; BOCHIALINI, K.; COSTA, A.; ROVIRA, M.

SOLAR PHYSICS

SPRINGER

Lugar: Berlin; Año: 1999 vol. 186 p. 281 - 290

0038-0938

We have studied through a multiresolution wavelet analysis the oscillations in a limb prominence. Intensity fluctuations in time and height corresponding to different lines of Siiv and Oiv observed with SUMER on board SOHO have been analyzed in the wavelet bands of J_3= 1min 36s to 3min 12s and J_4=3min 12s to 6min 24s. For all species, oscillations in the J_4 band were dominant. We found relevant differences between the behavior of line D_1 (1393.76 Å) corresponding to Siiv and the set D_2 (1401.16 Å), D_3 (1404.81 Å), D_4 (1402.77 Å) corresponding to Oiv, Oiv and Siiv respectively. We also report the identification of a pulse in the intensity of the line D_1 that appears in the range of 15-20min. This disturbance seems to travel with a speed of about 170kms^-1.