Dynamical Analysis of Galaxy Cluster Merger Abell 2146

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dc.contributor.authorWhite, Jacob A.en_US
dc.contributor.authorCanning, R. E. A.en_US
dc.contributor.authorKing, Lindsay J.en_US
dc.contributor.authorLee, Brandyn E.en_US
dc.contributor.authorRussell, H. R.en_US
dc.contributor.authorBaum, S. A.en_US
dc.contributor.authorClowe, D. I.en_US
dc.contributor.authorColeman, Joseph E.en_US
dc.contributor.authorDonahue, M.en_US
dc.contributor.authorEdge, A. C.en_US
dc.contributor.authorFabian, A. C.en_US
dc.contributor.authorJohnstone, R. M.en_US
dc.contributor.authorMcNamara, B. R.en_US
dc.contributor.authorO'Dea, C. P.en_US
dc.contributor.authorSanders, J. S.en_US
dc.contributor.utdAuthorWhite, Jacob A.en_US
dc.contributor.utdAuthorKing, Lindsay J.en_US
dc.contributor.utdAuthorLee, Brandyn E.en_US
dc.contributor.utdAuthorColeman, Joseph E.en_US
dc.date.accessioned2016-07-07T14:47:32Z
dc.date.available2016-07-07T14:47:32Z
dc.date.created2015-09-03en_US
dc.date.issued2015-09-03en_US
dc.description.abstractWe present a dynamical analysis of the merging galaxy cluster system Abell 2146 using spectroscopy obtained with the Gemini Multi-Object Spectrograph on the Gemini North telescope. As revealed by the Chandra X-ray Observatory, the system is undergoing a major merger and has a gas structure indicative of a recent first core passage. The system presents two large shock fronts, making it unique amongst these rare systems. The hot gas structure indicates that the merger axis must be close to the plane of the sky and that the two merging clusters are relatively close in mass, from the observation of two shock fronts. Using 63 spectroscopically determined cluster members, we apply various statistical tests to establish the presence of two distinct massive structures. With the caveat that the system has recently undergone a major merger, the virial mass estimate is M_{vir} = 8.5_{-4.7}^{+4.3} x 10¹⁴ M_⊙ for the whole system, consistent with the mass determination in a previous study using the Sunyaev-Zel'dovich signal. The newly calculated redshift for the system is z = 0.2323. A two-body dynamical model gives an angle of 13⁰-19⁰ between the merger axis and the plane of the sky, and a time-scale after first core passage of 0.24-0.28 Gyr.en_US
dc.description.sponsorshipen_US
dc.identifier.bibliographicCitationWhite, J. A., R. E. A. Canning, L. J. King, B. E. Lee, et al. 2015. "Dynamical analysis of galaxy cluster merger Abell 2146." Monthly Notices of the Royal Astronomical Society 453(3), doi: 10.1093/mnras/stv1831.en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issue3en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/4904
dc.identifier.volume453en_US
dc.language.isoenen_US
dc.publisherOxford Univ Pressen_US
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stv1831
dc.rights©2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en_US
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectGalaxies--Clustersen_US
dc.subjectAbell 2146en_US
dc.subjectGalactic halosen_US
dc.subjectDark matter (Astronomy)en_US
dc.subjectChandra X-ray Observatory (U.S.)en_US
dc.titleDynamical Analysis of Galaxy Cluster Merger Abell 2146en_US
dc.type.genreArticleen_US

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