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- W2017943866 abstract "In a much-noticed recent study Lauer & Postman found that the inertial frame defined by a sample of 119 nearby Abell clusters with cz☉ 6000 km s-1. For this subsample, the random errors in the bulk motion are large. We find that the bulk motion is consistent both with no motion in the CMB frame and with the motion found by Lauer & Postman. However, our analysis of all 107 Lauer & Postman BCGs with czLG > 6000 km s-1 indicates that, even with no X-ray correction, the motion of these clusters with respect to the CMB frame is not significantly different from zero. Furthermore, the correction to the bulk motion of the subsample with X-ray data goes in the sense of reducing the amplitude (by 663 km s-1) and significance (from 98.8% to 83.8%) of its motion in the CMB frame, as well as reducing the internal inconsistency between its motion and that of the remainder of the Lauer & Postman sample with no X-ray data. Claims of large-scale, large-amplitude bulk flows should therefore be regarded with caution until X-ray data become available for more clusters or until cluster distances are confirmed by independent methods." @default.
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- W2017943866 date "1997-04-20" @default.
- W2017943866 modified "2023-09-26" @default.
- W2017943866 title "The Environmental Dependence of Brightest Cluster Galaxies: Implications for Large‐Scale Flows" @default.
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- W2017943866 doi "https://doi.org/10.1086/303904" @default.
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