Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-12-02
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
10 pages, 6 figures. Accepted by MNRAS
Scientific paper
10.1111/j.1365-2966.2011.20360.x
We quantify the performance of a non-linear Wiener filter, constructed in wavelet space, at recovering some of the Fisher information that was lost in the weak lensing convergence field. The proposed method consists in a separation of the original field into the sum of a Gaussian and a non-Gaussian contribution. After filtering an ensemble of such fields, which are obtained from $N$-body simulations, we find that we can recapture about four times more Fisher information, an effect that can potentially improve by a significant amount the constraining power of weak lensing surveys on cosmological parameters, including the dark energy equation of state $\omega$. We compare this performance with that of the logarithmic mapping and find that the wavelet method can recover up to three times more information.
Harnois-Déraps Joachim
Pen U.-L.
Yu Hao-Ran
Zhang Tong-Jie
No associations
LandOfFree
Information Content in the Angular Power Spectrum of Weak Lensing: Wavelet Method 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 Information Content in the Angular Power Spectrum of Weak Lensing: Wavelet Method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information Content in the Angular Power Spectrum of Weak Lensing: Wavelet Method will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-603796