Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21922306r&link_type=abstract
American Astronomical Society, AAS Meeting #219, #223.06
Astronomy and Astrophysics
Astronomy
Scientific paper
Here we present the weak lensing results of A1758N, which agree with previous weak lensing results of merging clusters such as 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 in A1758N are separated at the 2.5 σ level. We estimate the combined mass of the clusters in A1758N to be 2.2 ± 0.5 × 1015 M&sun; and r200=2300-130+100 kpc. We also detect seven strong lensing candidates, two of which may provide information that would improve the mass measurements of A1758N.
Support for program HST-GO-11194.01-A was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555. DC also acknowledges support from the Alfred P. Sloan Foundation.
Clowe Douglas I.
Ragozzine Brett A.
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