TY - JOUR
T1 - Large-scale structure and dynamics of the most X-ray luminous galaxy cluster known - RX J1347-1145
AU - Lu, Ting
AU - Gilbank, David G.
AU - Balogh, Michael L.
AU - Milkeraitis, Martha
AU - Hoekstra, Henk
AU - Van Waerbeke, Ludovic
AU - Wake, David A.
AU - Edge, Alastair C.
AU - Bower, Richard G.
PY - 2010/4
Y1 - 2010/4
N2 - We present photometric, spectroscopic and weak lensing analysis of the large-scale structure and dynamics of the most X-ray luminous galaxy cluster known, RX J1347-1145, at z = 0.451. We spectroscopically confirmed 47 new members with Low Dispersion Survey Spectrograph 3 (LDSS3) on the Magellan telescope. Together with previously known members, we measure a new velocity dispersion of 1163 ± 97 km s-1. The mass inferred from our velocity dispersion is M200=1.16+0.32-0.27× 1015 M⊙, with r200= 1.85 Mpc, under the assumption of a singular isothermal sphere. We also present a weak lensing analysis using deep Canada-France-Hawaii Telescope (CFHT) data on this cluster, and find a deprojected mass of 1.47+0.46-0.43× 1015 M⊙ within r200, in excellent agreement with our dynamical estimate. Thus, our new dynamical mass estimate is consistent with that from weak lensing and X-ray studies in the literature, resolving a previously claimed discrepancy. We photometrically detect and spectroscopically confirm another massive cluster with σ= 780 ± 100 km s-1 and M200= 3.4+1.4-1.1 × 1014 M⊙∼ 7 Mpc south-west of RX J1347-1145, which we refer to as RXJ1347-SW. Our spectroscopic survey reveals a possible excess of galaxies in velocity space in the region between RX J1347-1145 and RXJ1347-SW; comparing with simulations, this excess appears consistent with that expected from a large filamentary structure traced by galaxies connecting these two clusters.
AB - We present photometric, spectroscopic and weak lensing analysis of the large-scale structure and dynamics of the most X-ray luminous galaxy cluster known, RX J1347-1145, at z = 0.451. We spectroscopically confirmed 47 new members with Low Dispersion Survey Spectrograph 3 (LDSS3) on the Magellan telescope. Together with previously known members, we measure a new velocity dispersion of 1163 ± 97 km s-1. The mass inferred from our velocity dispersion is M200=1.16+0.32-0.27× 1015 M⊙, with r200= 1.85 Mpc, under the assumption of a singular isothermal sphere. We also present a weak lensing analysis using deep Canada-France-Hawaii Telescope (CFHT) data on this cluster, and find a deprojected mass of 1.47+0.46-0.43× 1015 M⊙ within r200, in excellent agreement with our dynamical estimate. Thus, our new dynamical mass estimate is consistent with that from weak lensing and X-ray studies in the literature, resolving a previously claimed discrepancy. We photometrically detect and spectroscopically confirm another massive cluster with σ= 780 ± 100 km s-1 and M200= 3.4+1.4-1.1 × 1014 M⊙∼ 7 Mpc south-west of RX J1347-1145, which we refer to as RXJ1347-SW. Our spectroscopic survey reveals a possible excess of galaxies in velocity space in the region between RX J1347-1145 and RXJ1347-SW; comparing with simulations, this excess appears consistent with that expected from a large filamentary structure traced by galaxies connecting these two clusters.
KW - Galaxies: clusters: general
KW - Galaxies: clusters: individual: RX J1347-1145
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U2 - 10.1111/j.1365-2966.2010.16245.x
DO - 10.1111/j.1365-2966.2010.16245.x
M3 - Article
AN - SCOPUS:77953029104
SN - 0035-8711
VL - 403
SP - 1787
EP - 1800
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -