Luminous Red Galaxy Clustering at z~0.7 - First Results using AAOmega

Abstract

We report on the AAT-AAOmega LRG Pilot observing run to establish the feasibility of a large spectroscopic survey using the new AAOmega instrument. We have selected Luminous Red Galaxies (LRGs) using single epoch SDSS riz-photometry to i<20.5 and z<20.2. We have observed in 3 fields including the COSMOS field and the COMBO-17 S11 field, obtaining a sample of ~600 redshift z>=0.5 LRGs. Exposure times varied from 1 - 4 hours to determine the minimum exposure for AAOmega to make an essentially complete LRG redshift survey in average conditions. We show that LRG redshifts to i<20.5 can measured in approximately 1.5hr exposures and present comparisons with 2SLAQ and COMBO-17 (photo-)redshifts. Crucially, the riz selection coupled with the 3-4 times improved AAOmega throughput is shown to extend the LRG mean redshift from z=0.55 for 2SLAQ to z=0.681+/- 0.005 for riz-selected LRGs. This extended range is vital for maximising the S/N for the detection of the baryon acoustic oscillations (BAOs). Furthermore, we show that the amplitude of LRG clustering is s_0 = 9.9+/-0.7 h^-1 Mpc, as high as that seen in the 2SLAQ LRG Survey. Consistent results for the real-space amplitude are found from projected and semi-projected correlation functions. This high clustering amplitude is consistent with a long-lived population whose bias evolves as predicted by a simple ``high-peaks'' model. We conclude that a redshift survey of 360 000 LRGs over 3000deg^2, with an effective volume some 4 times bigger than previously used to detect BAO with LRGs, is possible with AAOmega in 170 nights.

12 pages, 7 figures, 8 tables, minor changes, matches published version

References in corpus (42)

• Stellar population synthesis at the resolution of 2003
• The Sloan Digital Sky Survey: Technical Summary
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The 2dF Galaxy Redshift Survey: Spectra and redshifts
• Baryonic Features in the Matter Transfer Function
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• Stable clustering, the halo model and nonlinear cosmological power spectra
• The Cosmic Evolution Survey (COSMOS) -- Overview
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• The Fourth Data Release of the Sloan Digital Sky Survey
• Spectroscopic Target Selection for the Sloan Digital Sky Survey: The Luminous Red Galaxy Sample
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys
• Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• The COMBO-17 Survey: Evolution of the Galaxy Luminosity Function from 25,000 Galaxies with 0.2<z<1.2
• The Clustering of Luminous Red Galaxies in the Sloan Digital Sky Survey Imaging Data
• Improved forecasts for the baryon acoustic oscillations and cosmological distance scale
• The shape of the SDSS DR5 galaxy power spectrum
• Baryonic Signatures in Large-Scale Structure
• The 2dF-SDSS LRG and QSO Survey: QSO clustering and the L-z degeneracy
• A comparison of estimators for the two-point correlation function
• The Intermediate-Scale Clustering of Luminous Red Galaxies
• The 2dF-SDSS LRG and QSO Survey: The LRG 2-Point Correlation Function and Redshift-Space Distortions
• Baryonic acoustic oscillations in simulated galaxy redshift surveys
• The IRAC Shallow Survey
• The detectability of baryonic acoustic oscillations in future galaxy surveys
• The 2dF-SDSS LRG and QSO (2SLAQ) Luminous Red Galaxy Survey
• The 2dF-SDSS LRG and QSO survey: Evolution of the Luminosity Function of Luminous Red Galaxies to z=0.6
• Acoustic oscillations in the SDSS DR4 Luminous Red Galaxy sample power spectrum
• Measuring the matter density using baryon oscillations in the SDSS
• GEMS Imaging of Red Sequence Galaxies at z~0.7: Dusty or Old?
• Average spectra of massive galaxies in the SDSS
• MegaZ-LRG: A photometric redshift catalogue of one million SDSS Luminous Red Galaxies
• Halo-model signatures from 380,000 SDSS Luminous Red Galaxies with photometric redshifts
• Modelling the redshift-space distortion of galaxy clustering
• Galaxy clustering from COMBO-17: The halo occupation distribution at <z>=0.6
• The Bright End of the Luminosity Function of Red Sequence Galaxies
• Optimising Baryon Acoustic Oscillation Surveys - I: Testing the concordance LCDM cosmology
• Searching for modified gravity with baryon oscillations: from SDSS to wide field multiobject spectroscopy (WFMOS)

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• Cross-correlating WMAP5 with 1.5 million LRGs: a new test for the ISW effect
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• Combining Dark Energy Survey Science Verification Data with Near Infrared Data from the ESO VISTA Hemisphere Survey
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• Clustering properties of high redshift red galaxies in SA22 from the UKIDSS DXS
• Forecasting the Dark Energy Measurement with Baryon Acoustic Oscillations: Prospects for the LAMOST surveys
• The clustering amplitude of X-ray selected AGN at z=0.8: Evidence for a negative dependence on accretion luminosity
• Clustering analysis of high-redshift Luminous Red Galaxies in Stripe 82
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• Stellar Mass and color dependence of the three-point correlation function of galaxies in the local universe
• Photometric Selection of Emission Line Galaxies, Clustering Analysis and a Search for the ISW effect
• Evolution in the clustering strength of radio galaxies
• Halo-model analysis of the clustering of photometric luminous red galaxies at $0.10\le z\le 1.05$ from the Subaru Hyper Suprime-Cam Survey
• Quasars at intermediate redshift are not special; but they are often satellites
• Cross-correlating Planck with VST ATLAS LRGs: a new test for the ISW effect in the Southern Hemisphere
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