The Distribution of Dark and Luminous Matter in the Unique Galaxy Cluster Merger Abell 2146

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dc.contributor.ISNI0000 0001 2437 3571 (King, LJ)en_US
dc.contributor.ORCID0000-0001-8445-0444 (White, JA)en_US
dc.contributor.authorKing, Lindsay J.en_US
dc.contributor.authorClowe, D. I.en_US
dc.contributor.authorColeman, Joseph E.en_US
dc.contributor.authorRussell, H. R.en_US
dc.contributor.authorSantana, R.en_US
dc.contributor.authorWhite, Jacob A.en_US
dc.contributor.authorCanning, R. E. A.en_US
dc.contributor.authorDeering, Nicole J.en_US
dc.contributor.authorFabian, A. C.en_US
dc.contributor.authorLee, Brandyn E.en_US
dc.contributor.authorLi, B.en_US
dc.contributor.authorMcNamara, B. R.en_US
dc.contributor.utdAuthorKing, Lindsay J.en_US
dc.contributor.utdAuthorClowe, D. I.en_US
dc.contributor.utdAuthorColeman, Joseph E.en_US
dc.contributor.utdAuthorRussell, H. R.en_US
dc.contributor.utdAuthorSantana, R.en_US
dc.contributor.utdAuthorWhite, Jacob A.en_US
dc.contributor.utdAuthorCanning, R. E. A.en_US
dc.contributor.utdAuthorDeering, Nicole J.en_US
dc.contributor.utdAuthorFabian, A. C.en_US
dc.contributor.utdAuthorLee, Brandyn E.en_US
dc.contributor.utdAuthorLi, B.en_US
dc.contributor.utdAuthorMcNamara, B. R.en_US
dc.date.accessioned2018-05-15T22:50:21Z
dc.date.available2018-05-15T22:50:21Z
dc.date.created2016-03-07
dc.description.abstractAbell 2146 (z = 0.232) consists of two galaxy clusters undergoing a major merger. The system was discovered in previous work, where two large shock fronts were detected using the Chandra X-ray Observatory, consistent with a merger close to the plane of the sky, caught soon after first core passage. A weak gravitational lensing analysis of the total gravitating mass in the system, using the distorted shapes of distant galaxies seen with Advanced Camera for Surveys - Wide Field Channel on Hubble Space Telescope, is presented. The highest peak in the reconstruction of the projected mass is centred on the brightest cluster galaxy (BCG) in Abell 2146-A. The mass associated with Abell 2146-B is more extended. Bootstrapped noise mass reconstructions show the mass peak in Abell 2146-A to be consistently centred on the BCG. Previous work showed that BCG-A appears to lag behind an X-ray cool core; although the peak of the mass reconstruction is centred on the BCG, it is also consistent with the X-ray peak given the resolution of the weak lensing mass map. The best-fitting mass model with two components centred on the BCGs yields M200 = 1.1_{-0.4}^{+0.3} × 10¹⁵ and 3_{-2}^{+1} × 10¹⁴ M_⊙ for Abell 2146-A and Abell 2146-B, respectively, assuming a mass concentration parameter of c = 3.5 for each cluster. From the weak lensing analysis, Abell 2146-A is the primary halo component, and the origin of the apparent discrepancy with the X-ray analysis where Abell 2146-B is the primary halo is being assessed using simulations of the merger.en_US
dc.description.sponsorshipen_US
dc.identifier.bibliographicCitationKing, L. J., D. I. Clowe, J. E. Coleman, H. R. Russell, et al. 2016. "The distribution of dark and luminous matter in the unique galaxy cluster merger Abell 2146." Monthly Notices of the Royal Astronomical Society 459(1), doi: 10.1093/mnras/stw507en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issue1en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5750
dc.identifier.volume459en_US
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stw507
dc.rights©2016 The Authors. Published by Oxford University Press. All Rights Reserved.en_US
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectGalaxies—Clustersen_US
dc.subjectAbell 2146en_US
dc.subjectGalaxy mergersen_US
dc.subjectX-ray sources, Galacticen_US
dc.subjectX-ray astronomyen_US
dc.subjectGalactic halosen_US
dc.titleThe Distribution of Dark and Luminous Matter in the Unique Galaxy Cluster Merger Abell 2146en_US
dc.type.genrearticleen_US

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