Astronomy:Angular correlation function

Short description: Measure of the projected clustering of galaxies

The angular correlation function is a function which measures the projected clustering of galaxies, due to discrepancies between their actual and expected distributions. The function may be computed as follows: $w(\theta )=\frac{1}{N}\frac{dP}{d\mathrm{\Omega }}-1$, where $P$ represents the conditional probability of finding a galaxy, $\mathrm{\Omega }$ denotes the solid angle, and $N$ is the mean number density. In a homogeneous universe, the angular correlation scales with a characteristic depth.