ar X iv : a st ro - p h / 98 07 06 8 v 2 9 J ul 1 99 8 Recovery of the Shape of the Mass Power Spectrum from the Lyman - alpha Forest
نویسنده
چکیده
We propose a method for recovering the shape of the mass power spectrum on large scales from the transmission fluctuations of the Lyman-alpha forest, which takes into account directly redshift-space distortions. The procedure, in discretized form, involves the inversion of a triangular matrix which projects the mass power spectrum in 3-D real-space to the transmission power spectrum in 1-D redshift-space. We illustrate the method by performing a linear calculation relating the two. A method that does not take into account redshift-space anisotropy tends to underestimate the steepness of the mass power spectrum, in the case of linear distortions. The issue of the effective bias-factor for the linear distortion kernel is discussed. Subject headings: cosmology: theory — intergalactic medium — quasars: absorption lines — large-scale structure of universe
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ar X iv : a st ro - p h / 98 07 06 8 v 1 7 J ul 1 99 8 Recovery of the Shape of the Mass Power Spectrum from the Lyman - alpha Forest
We propose a method for recovering the shape of the mass power spectrum on large scales from the transmission fluctuations of the Lyman-alpha forest, which takes into account directly redshift-space distortions. The procedure, in discretized form, involves the inversion of a triangular matrix which projects the mass power spectrum in 3-D real-space to the transmission power spectrum in 1-D reds...
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