Weak Lensing Results of the Merging Cluster A1758

Weak Lensing Results of the Merging Cluster A1758

Here we present the weak lensing results of A1758, which is known to consist of four subclusters undergoing two separate mergers, A1758N and A1758S. Weak lensing results of A1758N agree with previous weak lensing results of clusters 1E0657-558 (Bullet cluster) and MACS J0025.4-1222, whose X-ray gas...

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Veröffentlicht in:arXiv.org 2011-11
Hauptverfasser: Ragozzine, Brett, Clowe, Douglas, Markevitch, Maxim, Gonzalez, Anthony H, Bradac, Marusa
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Clowe, Douglas
Markevitch, Maxim
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Bradac, Marusa
description Here we present the weak lensing results of A1758, which is known to consist of four subclusters undergoing two separate mergers, A1758N and A1758S. Weak lensing results of A1758N agree with previous weak lensing results of clusters 1E0657-558 (Bullet cluster) and MACS J0025.4-1222, whose X-ray gas components were found to be largely separated from their clusters' gravitational potentials. A1758N has a geometry that is different from previously published mergers in that one of its X-ray peaks overlays the corresponding gravitational potential and the other X-ray peak is well separated from its cluster's gravitational potential. The weak lensing mass peaks of the two northern clusters are separated at the 2.5 sigma level. We estimate the combined mass of the clusters in A1758N to be 2.2+/-0.5*10^15 M_sun and r_200=2300(+100/-130) kpc. We also detect seven strong lensing candidates, two of which may provide information that would improve the mass measurements of A1758N.
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subjects Clusters
Gravitation
Physics - Cosmology and Nongalactic Astrophysics
title Weak Lensing Results of the Merging Cluster A1758
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