Galaxy and Mass Assembly (GAMA): Witnessing the assembly of the cluster Abell 1882
M.S. Owers, I. K. Baldry, A. E. Bauer, J. Bland-Hawthorn, M. J. I., Brown, M. E. Cluver, M. Colless, S. P. Driver, A. C. Edge, A. M. Hopkins, E., van Kampen, M. A. Lara-Lopez, J. Liske, J. Loveday, K. A. Pimbblet, T., Ponman, A. S. G. Robotham

TL;DR
This study combines optical and X-ray data to analyze the substructure and recent assembly history of galaxy cluster Abell 1882, revealing two main components likely before a core passage, with implications for understanding cluster mergers.
Contribution
It provides a detailed multi-wavelength analysis of Abell 1882, identifying two main subclusters and their dynamical state, which was not previously characterized in such detail.
Findings
A1882 has two main components, A1882A and A1882B, separated by 2 Mpc.
Mass estimates show A1882A is roughly twice as massive as A1882B.
The system is likely observed before a core passage, with no recent major interaction evidence.
Abstract
We present a combined optical and X-ray analysis of the rich cluster Abell 1882 with the aim of identifying merging substructure and understanding the recent assembly history of this system. Our optical data consist of spectra drawn from the Galaxy and Mass Assembly (GAMA) survey, which lends itself to this kind of detailed study thanks to its depth and high spectroscopic completeness. We use 283 spectroscopically confirmed cluster members to detect and characterize substructure. We complement the optical data with X-ray data taken with both Chandra and XMM. Our analysis reveals that A1882 harbors two main components, A1882A and A1882B, which have a projected separation of 2Mpc and a line of sight velocity difference of v_{los}=-428km/s. The primary system, A1882A, has velocity dispersion sigma_v=500km/s and Chandra (XMM) temperature kT=3.57keV (3.31keV) while the secondary, A1882B, has…
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