Cluster Mass Reconstruction Using Gravitational Lensing

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We discuss lensing mass reconstruction of galaxy clusters using a variety of techniques, including Particle Based Lensing (PBL). We describe how the PBL approach differs from currently used methods, and discuss the more generic problem of structure smoothing in lensing reconstruction. We apply these methods to two clusters: A901/902 and A1689. In A901/902, we perform weak lensing mass reconstruction of the four mass peaks and measure the ellipticities of the dark matter halos. We perform a Strong+Weak lensing mass reconstruction of A1689 and compare the reconstructed profile with gas distribution from X-rays and parametric strong lensing mass reconstruction. We also compute the ratio of weak lensing to X-ray mass in annular bins centered around the X-ray peak to test the radial dependence of departures from hydrostatic equilibrium.

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