The Small-scale Clustering of Luminous Red Galaxies via Cross-Correlation Techniques

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Accepted for ApJ. LaTeX, 16 pages, 5 figures

Scientific paper

10.1086/426500

We present the small-scale (0.2h^{-1} to 7h^{-1} Mpc) cross-correlations between 32,000 luminous early-type galaxies and a reference sample of 16 million normal galaxies from the Sloan Digital Sky Survey. Our method allows us to construct the spherically averaged, real-space cross-correlation function between the spectroscopic LRG sample and galaxies from the SDSS imaging. We report the cross-correlation as a function of scale, luminosity, and redshift. We find very strong luminosity dependences in the clustering amplitudes, up to a factor of 4 over a factor of 4 in luminosity, and measure this dependence with high signal-to-noise ratio. The luminosity dependence of bias is found to depend on scale, with more variation on smaller scales. The clustering as a function of scale is not a power law, but instead has a dip at 1h^{-1} Mpc and an excess on small scales. The fraction of red galaxies within the L* sample surrounding LRGs is a strong function of scale, as expected. However, the fraction of red galaxies evolves in redshift similarly on small and large scales, suggesting that cluster and field populations are changing in the same manner. The results highlight the advantage on small scales of using cross-correlation methods as a means of avoiding shot noise in samples of rare galaxies.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The Small-scale Clustering of Luminous Red Galaxies via Cross-Correlation Techniques 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 The Small-scale Clustering of Luminous Red Galaxies via Cross-Correlation Techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Small-scale Clustering of Luminous Red Galaxies via Cross-Correlation Techniques will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-84845

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.