Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-08-20
Astrophysical Journal. 728 (2011) 35
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
7 pages, 6 figures. Accepted for publication in The Astrophysical Journal
Scientific paper
10.1088/0004-637X/728/1/35
We develop a purely mathematical tool to recover some of the information lost in the non-linear collapse of large-scale structure. From a set of 141 simulations of dark matter density fields, we construct a non-linear Weiner filter in order to separate Gaussian and non-Gaussian structure in wavelet space. We find that the non-Gaussian power is dominant at smaller scales, as expected from the theory of structure formation, while the Gaussian counterpart is damped by an order of magnitude on small scales. We find that it is possible to increase the Fisher information by a factor of three before reaching the translinear plateau, an effect comparable to other techniques like the linear reconstruction of the density field.
Harnois-Déraps Joachim
MacDonald Ilana
Pen U.-L.
Yu Hao-Ran
Zhang Tong-Jie
No associations
LandOfFree
Increasing the Fisher Information Content in the Matter Power Spectrum by Non-linear Wavelet Weiner Filtering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Increasing the Fisher Information Content in the Matter Power Spectrum by Non-linear Wavelet Weiner Filtering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Increasing the Fisher Information Content in the Matter Power Spectrum by Non-linear Wavelet Weiner Filtering will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-80987