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Substructure in the Frontier Fields from weak lensing flexion

Published online by Cambridge University Press:  27 October 2016

Markus Rexroth
Markus Rexroth*
Affiliation:
Laboratoire d'Astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
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Abstract

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Flexion is the second order weak gravitational lensing effect responsible for the arclike appearance of sources. It is highly sensitive to dark matter substructure and can greatly increase the resolution of mass maps, but it is very hard to measure. We present an automated flexion measurement pipeline for Hubble Space Telescope data and a preliminary application to the Frontier Fields cluster MACSJ0416.1-2403.

Keywords

Gravitational lensingdark matterclusters: individual (MACSJ0416.1-2403)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B: Astronomy in Focus , August 2015 , pp. 795 - 796
Copyright
Copyright © International Astronomical Union 2016 

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