SDSS photometry of luminous red galaxies Virtual Observatory Resource

Authors
  1. Ross N.P.
  2. Shanks T.
  3. Cannon R.D.
  4. Wake D.A.
  5. Sharp R.G.
  6. Croom S.M.,Peacock J.A.
  7. Published by
    CDS
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 three 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 14h 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 be measured in >>1.5h exposures and present comparisons with 2SLAQ and COMBO-17 (photo)redshifts. Crucially, the riz selection coupled with the three to four 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 maximizing the signal-to-noise ratio for the detection of the baryon acoustic oscillations (BAOs). Furthermore, we show that the amplitude of LRG clustering is s_0_=9.9+/-0.7h^-1^Mpc, as high as that seen in the 2SLAQ LRG Survey. Consistent results for this clustering amplitude are found from the projected and semi-projected correlation functions. This high amplitude is consistent with a long-lived population whose bias evolves as predicted by a simple 'high-peak' model. We conclude that a redshift survey of 360000 LRGs over 3000deg^2^, with an effective volume some four times bigger than previously used to detect BAO with LRGs, is possible with AAOmega in 170 nights.

Keywords
  1. surveys
  2. galaxies
  3. photometry
  4. visible-astronomy
  5. sloan-photometry
Bibliographic source Bibcode
2008MNRAS.387.1323R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/387/1323
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/387/1323
Document Object Identifer DOI
doi:10.26093/cds/vizier.73871323

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/387/1323
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/387/1323
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/387/1323
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/387/1323/tablea1?

History

2009-01-31T10:44:03Z
Resource record created
2009-01-31T10:44:03Z
Created
2024-07-06T20:16:19Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr