The scale of homogeneity in the Las Campanas Redshift Survey

Details The scale of homogeneity in the Las Campanas Redshift Survey The scale of homogeneity in the Las Campanas Redshift Survey

1999-01-29

arxiv.org/abs/astro-ph/9901420v1

Astrophys.J. 514 (1999) L1

Astronomy and Astrophysics

Astrophysics

8 pages, 3 figures, accepted on Ap.J. Letters

Scientific paper

10.1086/311936

We analyse the Las Campanas Redshift Survey using the integrated conditional density (or density of neighbors) in volume-limited subsamples up to unprecedented scales (200 Mpc/$h$) in order to determine without ambiguity the behavior of the density field. We find that the survey is well described by a fractal up to 20-30 Mpc/$h$, but flattens toward homogeneity at larger scales. Although the data are still insufficient to establish with high significance the expected homogeneous behavior, and therefore to rule out a fractal trend to larger scales, a fit with a CDM-like spectrum with high normalization well represents the data.

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