Low-order p modes from VIRGO irradiance data

Several candidates for low-order p modes (n less than or equal to 5) and po ssibly g modes were found by applying mode-detection techniques such as mul tivariate spectral regression analysis and time-frequency analysis to the V IRGO full-disc solar irradiance data. Three out of the candidates for low-o rder p modes could be confirmed by significant peaks in the un-treated powe r spectra in good agreement with theoretical predictions. The frequency of a fourth candidate for a low-order p mode lies some 2.8 mu Hz below the pre dicted frequency. The candidates found for g modes are less reliable, since none of them could be confirmed neither by significant peaks in the un-tre ated power spectra nor by the detection of multiplets.