Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-08-13
ApJ 727, 118 (2011)
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
11 pages, 6 figures. Accepted for publication in ApJ
Scientific paper
We present a new method for constructing three-dimensional mass maps from gravitational lensing shear data. We solve the lensing inversion problem using truncation of singular values (within the context of generalized least squares estimation) without a priori assumptions about the statistical nature of the signal. This singular value framework allows a quantitative comparison between different filtering methods: we evaluate our method beside the previously explored Wiener filter approaches. Our method yields near-optimal angular resolution of the lensing reconstruction and allows cluster sized halos to be de-blended robustly. It allows for mass reconstructions which are 2-3 orders-of-magnitude faster than the Wiener filter approach; in particular, we estimate that an all-sky reconstruction with arcminute resolution could be performed on a time-scale of hours. We find however that linear, non-parametric reconstructions have a fundamental limitation in the resolution achieved in the redshift direction.
Connolly Andrew
Jain Bhuvnesh
Jarvis Mike
VanderPlas Jake
No associations
LandOfFree
3D Reconstruction of the Density Field: An SVD Approach to Weak Lensing Tomography 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 3D Reconstruction of the Density Field: An SVD Approach to Weak Lensing Tomography, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 3D Reconstruction of the Density Field: An SVD Approach to Weak Lensing Tomography will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-42179