REJUVENATING THE MATTER POWER SPECTRUM: RESTORING INFORMATION WITH A LOGARITHMIC DENSITY MAPPING
By Mark Neyrinck, Istvan Szapudi, A. Szalay. 2009
138 citations recorded by the source corpus.
We find that nonlinearities in the dark matter power spectrum are dramatically smaller if the density field first undergoes a logarithmic mapping. In the Millennium simulation, this procedure gives a power spectrum with a shape hardly departing from the linear power spectrum for k ≲ 1 h Mpc−1 at all redshifts. Also, this procedure unveils pristine Fisher information on a range of scales reaching a factor of 2–3 smaller than in the standard power spectrum, yielding 10 times more cumulative signal to noise at z = 0.
Subfields: Astronomy and Astrophysics, Instrumentation, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/8bfab5a178b46ccfc3d6ad66c2fb2152ee6fb286
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Citations in the corpus
- The Initial Conditions of the Universe from Constrained Simulations (2012, methodology): “For this purpose a large amount of techniques (mostly based on local transformations) has been developed which Gaussianise the cosmic density field (see e. g. Neyrinck et al. 2009, 2011;?”