Strong Lensing Reconstruction

We present a general linear algorithm for measuring the surface mass density 1-kappa from the observable reduced shear g=gamma 1-kappa in the strong lensing regime. We show that in general, the observed polarization field can be decomposed into "electric" and "magnetic" component...

Full description

Saved in:
Bibliographic Details
Published inThe Astrophysical journal Vol. 534; no. 1; pp. L19 - L22
Main Author Pen, Ue-Li
Format Journal Article
LanguageEnglish
Published United States IOP Publishing 01.05.2000
Online AccessGet full text
ISSN1538-4357
0004-637X
1538-4357
DOI10.1086/312652

Cover

More Information
Summary:We present a general linear algorithm for measuring the surface mass density 1-kappa from the observable reduced shear g=gamma 1-kappa in the strong lensing regime. We show that in general, the observed polarization field can be decomposed into "electric" and "magnetic" components, which have independent and redundant solutions, but orthogonal noise properties. By combining these solutions, one can increase the signal-to-noise ratio by 2. The solutions allow dynamic optimization of signal and noise, both in real and Fourier space (using arbitrary smoothing windows). Boundary conditions have no effect on the reconstructions, apart from its effect on the signal-to-noise ratio. Many existing reconstruction techniques are recovered as special cases of this framework. The magnetic solution has the added benefit of yielding the global and local parity of the reconstruction in a single step.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1086/312652