The architecture of Abell 1386 and its relationship to the Sloan Great Wall - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




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Abstract: We present new radial velocities from AAOmega on the Anglo-AustralianTelescope for 307 galaxies b J < 19.5 in the region of the rich cluster Abell1386. Consistent with other studies of galaxy clusters that constitutesub-units of superstructures, we find that the velocity distribution of A1386is very broad 21,000-42,000 kms^-1, or z=0.08-0.14 and complex. The meanredshift of the cluster that Abell designated as number 1386 is found to be~0.104. However, we find that it consists of various superpositions ofline-of-sight components. We investigate the reality of each component bytesting for substructure and searching for giant elliptical galaxies in eachand show that A1386 is made up of at least four significant clusters or groupsalong the line of sight whose global parameters we detail. Peculiar velocitiesof brightest galaxies for each of the groups are computed and found to bedifferent from previous works, largely due to the complexity of the sky areaand the depth of analysis performed in the present work. We also analyse A1386in the context of its parent superclusters: Leo A, and especially the SloanGreat Wall. Although the new clusters may be moving toward mass concentrationsin the Sloan Great Wall or beyond, many are most likely not yet physicallybound to it.



Autor: Kevin A. Pimbblet, Heinz Andernach, Cherie K. Fishlock, Isaac G. Roseboom, Matthew S. Owers

Fuente: https://arxiv.org/







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