The 2dF-SDSS LRG and QSO survey: The LRG 2-point correlation function and redshift-space distortions

Nic Ross, J Da Angela, Tom Shanks, David Wake, Russell Cannon, Alastair Edge, Robert Nichol, Phil Outram, Matthew Colless, Warrick Couch, Scott Croom, Roberto De Propris, Michael Drinkwater, Daniel Eisenstein, Jon Loveday, Kevin Pimbblet, Isaac Roseboom, Donald Schneider, Robert Sharp, P Weilbacher

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Abstract

We present a clustering analysis of luminous red galaxies (LRGs) using nearly 9000 objects from the final, three-year catalogue of the 2dF-SDSS LRG and QSO (2SLAQ) Survey. We measure the redshift-space two-point correlation function, I?(s) and find that, at the mean LRG redshift of shows the characteristic downturn at small scales (a??1 h-1 Mpc) expected from line-of-sight velocity dispersion. We fit a double power law to I?(s) and measure an amplitude and slope of s0 = 17.3+2.5-2.0 h-1 Mpc, I? = 1.03 A? 0.07 at small scales (s <4.5 h-1 Mpc) and s0 = 9.40 A? 0.19 h -1 Mpc, I? = 2.02 A? 0.07 at large scales (s > 4.5 h-1 Mpc). In the semiprojected correlation function, w p(I?), we find a simple power law with I? = 1.83 A? 0.05 and r0 = 7.30 A? 0.34 h-1 Mpc fits the data in the range 0.4 <I? <50 h-1 Mpc, although there is evidence of a steeper power law at smaller scales.
Original languageEnglish
Pages (from-to)573 - 588
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume381
Issue number2
DOIs
Publication statusPublished - 2007
Externally publishedYes

Cite this

Ross, N., Da Angela, J., Shanks, T., Wake, D., Cannon, R., Edge, A., Nichol, R., Outram, P., Colless, M., Couch, W., Croom, S., De Propris, R., Drinkwater, M., Eisenstein, D., Loveday, J., Pimbblet, K., Roseboom, I., Schneider, D., Sharp, R., & Weilbacher, P. (2007). The 2dF-SDSS LRG and QSO survey: The LRG 2-point correlation function and redshift-space distortions. Monthly Notices of the Royal Astronomical Society, 381(2), 573 - 588. https://doi.org/10.1111/j.1365-2966.2007.12289.x