Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data

Details Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data

2001-11-02

arxiv.org/abs/astro-ph/0111058v1

Astrophys.J. 570 (2002) 75-85

Astronomy and Astrophysics

Astrophysics

24 pages, submitted to ApJ

Scientific paper

10.1086/339574

We present initial results for counts in cells statistics of the angular distribution of galaxies in early data from the Sloan Digital Sky Survey (SDSS). We analyze a rectangular stripe $2.5^\circ$ wide, covering approximately 160 sq. degrees, containing over $10^6$ galaxies in the apparent magnitude range $18 < r^\prime < 22$, with areas of bad seeing, contamination from bright stars, ghosts, and high galactic extinction masked out. This survey region, which forms part of the SDSS Early Data Release, is the same as that for which two-point angular clustering statistics have recently been computed. The third and fourth moments of the cell counts, $s_3$ (skewness) and $s_4$ (kurtosis), constitute the most accurate measurements to date of these quantities (for $r^\prime < 21$) over angular scales $0.015^\circ-0.3^\circ$. They display the approximate hierarchical scaling expected from non-linear structure formation models and are in reasonable agreement with the predictions of $\Lambda$-dominated cold dark matter models with galaxy biasing that suppresses higher order correlations at small scales. The results are in general consistent with previous measurements in the APM, EDSGC, and Deeprange surveys. These results suggest that the SDSS imaging data are free of systematics to a high degree and will therefore enable determination of the skewness and kurtosis to 1% and less then 10%, as predicted by Colombi, Szapudi, & Szalay (1998).

Affiliated with

Also associated with

No associations

Rating

Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-235443