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Large-scale galaxy distribution in the Las Campanas Redshift Survey |
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| Authors: | A G Doroshkevich D L Tucker R Fong V Turchaninov H Lin |
| Institution: | Theoretical Astrophysics Center, Juliane Maries Vej 30, DK-2100 Copenhagen Ø, Denmark;Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, 125047 Moscow, Russia;Fermi National Accelerator Laboratory, MS 127, PO Box 500, Batavia, IL 60510, USA;Department of Physics, University of Durham, Durham DH1 3LE;Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA |
| Abstract: | We make use of three-dimensional clustering analysis, inertia tensor methods, and the minimal spanning tree technique to estimate some physical and statistical characteristics of the large-scale galaxy distribution and, in particular, of the sample of overdense regions seen in the Las Campanas Redshift Survey (LCRS). Our investigation provides additional evidence for a network of structures found in our core sampling analysis of the LCRS : a system of rich sheet-like structures, which in turn surround large underdense regions criss-crossed by a variety of filamentary structures. We find that the overdense regions contain ～40–50 per cent of LCRS galaxies and have proper sizes similar to those of nearby superclusters. The formation of such structures can be roughly described as a non-linear compression of protowalls of typical cross-sectional size ～ 20–25 h The comparison with available simulations and theoretical estimates shows that the formation of structure elements with parameters similar to those observed is presently possible only in low-density cosmological models, Ω |
| Keywords: | surveys galaxies: clusters: general large-scale structure of Universe |