Analysis of the solar low-l p-mode asymmetries using wavelets

It is presently widely accepted that the solar low l p modes show asymmetri c profiles when their power spectrum is analysed and that the fact of fitti ng symmetric profiles yields systematic effects in the obtained frequencies which could affect the results of inversions. In this paper the low l p-mo de profiles are analysed using wavelets to denoise the power spectra of the modes. This denoising method is applied both to artificial data generated by Kosovichev (the Hare and Hound exercise) and to real data obtained with the GOLF instrument. The asymmetries as well as the frequencies obtained ar e studied in both cases. The results show that although the obtained p-mode profiles present a slightly negative asymmetry, the use of symmetric profi les to fit the power spectra does not introduce any systematic effect in th e obtained frequencies.