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Using gravitational lensing flexions to constrain dark matter halo shapes and profiles
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Hierarchical structure formation theory predicts tri-axial halo shapes and density profiles. Gravitational lensing flexion is related to the derivative of the weak lensing shear and convergence. We show that, as a higher order derivative of the lensing potential, the flexion can be used to test these predictions.
This talk is part of the Institute of Astronomy Seminars series.
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