Our power spectrum model is based on normal noise added to some ideal function in the Fourier space, leading to a solar-like p-mode power spectrum. This process is intended to picture a stochastically driven oscillating system. We think that our simulation is realistic enough, and we have been able through it to verify numerically the corresponding theoretical predictions from Kumar. To use Monte Carlo simulation for the computation of error bars brings a few evidences:
As to the widths, the strategy of reducing the number of free parameters helps very much in reducing the error-bars by a factor of 2 in the best case. This is encouragingly in favor of the "iterative" fitting methods already designed for the collective splitting measurements (Toutain et al. 1992, Lazrek et al. 1996), in which some parameters of the vector are in turn locked, then released, then locked again down to the entire convergence of all the set.
The IRIS network was funded and is supported by the French Institut National des Sciences de l'Univers (I.N.S.U.) and the Centre National de la Recherche Scientifique (C.N.R.S.).
© European Southern Observatory (ESO) 1998
Online publication: April 15, 1998