Other
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237..589s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Vol. 237, NO. 3/APR1, P. 589, 1989
Other
31
Scientific paper
We investigate the galaxy clustering in the recently completed redshift survey of Metcalfe et al. At separations of between ~2 and 7 h^-1^ Mpc (H_0_ = 100 h km s^-1^ Mpc^-1^) the redshift two-point correlation function, ξ(s). has a correlation length of s_0_ = 7 h^-1^ Mpc thus confirming the result of Beam and Shanks et at. who detected such a `shoulder' feature in the redshift survey of Peterson et al. We now find that a similar feature is also seen in other redshift surveys. If it is due to a real spatial structure then it might imply non-scale-free clustering at small scales. If it is caused by peculiar velocities (infall) then a constraint on the density parameter, {OMEGA}_0_, might be achieved. At larger scales (s>~7 h^-1^ Mpc). ξ(s) breaks away quickly to zero and between ~10 and 100 h^-1^ Mpc we find no evidence of clustering which is significant at the 2 σ level. In this range we see a much lower degree of clustering than shown by the rich Abell clusters. However, there is some tentative evidence for large-scale features in ξ(s), but these are at low signal-to-noise and must await confirmation in larger redshift surveys. Thus, if galaxies are good tracers of the mass at these separations our results imply that the Universe is homogeneous to ~1 per cent in ξ over this range of scales.
Fong Richard
Metcalfe Nigel
Shanks Tom
Sutton Hale D.
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