EFAR peculiar velocities and bulk motions

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dc.creatorColless, Matthew
dc.creatorSaglia, R. P.
dc.creatorBurstein, David
dc.creatorDavies, Roger
dc.creatorMcMahan, Robert K.
dc.creatorWegner, Gary
dc.date1999-09-03
dc.date.accessioned2026-07-07T02:33:03Z
dc.date.available2026-07-07T02:33:03Z
dc.descriptionThe EFAR project has measured peculiar motions in two distant volumes of the universe using Fundamental Plane (FP) distances for 85 clusters with cz=6000-15000 km/s. The scatter in distance about the FP is observed to be 20% per galaxy for EFAR sample, resulting in peculiar velocities with a median precision of 1075 km/s for the 50 clusters with 3 or more galaxies. We find that there is no evidence for a large bulk flow within either of the two volumes sampled by the EFAR clusters. The measured bulk motion in both regions is small and consistent with zero. The Lauer and Postman (1994) bulk motion is ruled out at the 4-sigma level. There is no evidence supporting the SMAC (Hudson et al. 1999) or LP10K (Willick 1999) bulk motions, but the directionality of the EFAR sample would only allow a weak (2-sigma) detection at best.
dc.description8 pages, 5 figures, uses paspconf.sty, to appear in the proceedings of the Cosmic Flows workshop, Victoria B.C., Canada, July 1999, eds S. Courteau, M. Strauss, J. Willick, ASP Conference Series
dc.identifierhttps://arxiv.org/abs/astro-ph/9909062
dc.identifierhttp://arxiv.org/abs/astro-ph/9909062
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14691
dc.subjectAstrophysics
dc.titleEFAR peculiar velocities and bulk motions
dc.typetext

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