Chinese Journal of Astronomy and Astrophysics

Abstract The power spectrum estimator based on the Discrete Wavelet Transfor-mation (DWT) is applied to detect the clustering power in the IRAS Point Source Catalog Redshift Survey (PSCz). Comparison with mock samples extracted from N-body simulation shows that the DWT power spectrum estimator could provide a robust measurement of banded fluctuation power over a range of wavenumbers 0.1 ∼ 2.0hMpc−1. We have fitted three typical CDM models (SCDM, τCDM and ΛCDM) using the Peacock-Dodds formula including non-linear evolution and redshift distortion. We find that, our results are in good agreement with other statistical measurements of the PSCz. Key words: large-scale structure of Universe — Methods: N-body simulations