Measurement of halo properties with weak lensing shear and flexion
arXiv:1112.4670 · doi:10.1111/j.1365-2966.2012.20408.x
Abstract
We constrain properties of cluster haloes by performing likelihood analysis using lensing shear and flexion data. We test our analysis using two mock cluster haloes: an isothermal ellipsoid (SIE) model and a more realistic elliptical Navarro-Frenk-White (eNFW) model. For both haloes, we find that flexion is more sensitive to the halo ellipticity than shear. The introduction of flexion information significantly improves the constraints on halo ellipticity, orientation and mass. We also point out that there is a degeneracy between the mass and the ellipticity of SIE models in the lensing signal.
7 pages, 6 figures, MNRAS accepted
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Cited by in corpus (5)
- Constraints on the shapes of galaxy dark matter haloes from weak gravitational lensing
- Analytical shear and flexion of Einasto dark matter haloes
- Improving lensing cluster mass estimate with flexion
- Estimation of halo ellipticity using spin-3 flexion
- Gravitational lensing properties of isothermal universal halo profile