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Measurement of halo properties with weak lensing shear and flexion
Article first published online: 7 FEB 2012
DOI: 10.1111/j.1365-2966.2012.20408.x
© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Issue
Monthly Notices of the Royal Astronomical Society
Volume 421, Issue 2, pages 1443–1449, April 2012
Additional Information
How to Cite
Er, X., Tereno, I. and Mao, S. (2012), Measurement of halo properties with weak lensing shear and flexion. Monthly Notices of the Royal Astronomical Society, 421: 1443–1449. doi: 10.1111/j.1365-2966.2012.20408.x
Publication History
- Issue published online: 16 MAR 2012
- Article first published online: 7 FEB 2012
- Accepted 2011 December 16. Received 2011 December 15; in original form 2011 August 13
- Abstract
- Article
- References
- Cited By
Keywords:
- gravitational lensing: weak;
- galaxies: haloes
ABSTRACT
We constrain the 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 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.