Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-06-08
Astrophysical Journal Letters, 543 (2000), L107-L110
Astronomy and Astrophysics
Astrophysics
Accepted by the ApJ Letters, revised Physical Analysis, LaTex file, 10 pages, 1 ps figure
Scientific paper
10.1086/317273
We report a tentative detection of spin correlations in the Tully catalogue of nearby galaxies. We define a simple but nontrivial spin correlation function, and find an analytic estimate of it in the frame of the linear perturbation theory. Then, we present the observed spin correlation signal from the Tully galaxies with error bars. The three dimensional spin correlation turns out to be significant at the 97% confidence level, detected out to a few $h^{-1}$ Mpc. This observed correlation is consistent with the theoretical prediction based on the gravitational instability picture of galaxy formation. An analysis of systematic errors is also presented. The observed strength of correlation may be sufficient to significantly affect blank field of weak lensing searches.
Lee Jounghun
Pen U.-L.
Seljak Uros
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