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ACOUSTIC SCALE FROM THE ANGULAR POWER SPECTRA OF SDSS-III DR8 PHOTOMETRIC LUMINOUS GALAXIES

Hee‐Jong SeoBerkeley Center for Cosmological Physics, LBL and Department of Physics, University of California, Berkeley, CA 94720, USAShirley HoCarnegie Mellon University, Physics Department, 5000 Forbes Avenue, Pittsburgh, PA 15213, USAMartin WhiteDepartment of Astronomy, 601 Campbell Hall, University of California at Berkeley, Berkeley, CA 94720, USAAntonio J. CuestaYale Center for Astronomy and Astrophysics, Yale University, New Haven, CT 06511, USAA.J. RossInstitute of Cosmology & Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX, UKShun SaitoDepartment of Astronomy, 601 Campbell Hall, University of California at Berkeley, Berkeley, CA 94720, USABeth ReidLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USANikhil PadmanabhanYale Center for Astronomy and Astrophysics, Yale University, New Haven, CT 06511, USAWill J. PercivalInstitute of Cosmology & Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX, UKRoland de PutterInstituto de Fisica Corpuscular, Valencia, SpainDavid J. SchlegelLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USADaniel J. EisensteinHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 20, Cambridge, MA 02138, USAXiaoying XuSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USADonald P. SchneiderDepartment of Astronomy and Astrophysics, The Pennsylvania State University, University Park, PA 16802, USARamin SkibbaSteward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USALicia VerdeInstituciò Catalana de Recerca i Estudis Avançats, Barcelona, SpainRobert C. NicholInstitute of Cosmology & Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX, UKDmitry BizyaevH. BrewingtonJ. BrinkmannL. A. N. da CostaLaboratório Interinstitucional de e-Astronomia, LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ 20921-400, BrazilJ. Richard GottDepartment of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USAElena MalanushenkoViktor MalanushenkoDan OravetzN. Palanque‐DelabrouilleCEA, Centre de Saclay, IRFU, F-91191 Gif-sur-Yvette, FranceKaike PanFrancisco PradaInstituto de Astrofisica de Andalucia (CSIC), E-18008 Granada, SpainNicholas P. RossLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAAudrey SimmonsF. de SimoniDepartamento de Física e Matemática, PURO/Universidade Federal Fluminense, Rua Recife s/n, Jardim Bela Vista, Rio das Ostras, RJ 28890-000, BrazilAlaina SheldenStephanie A. SneddenIdit ZehaviDepartment of Astronomy, Case Western Reserve University, Cleveland, OH 44106, USA

2012en

ABI

Annotatsiya

We measure the acoustic scale from the angular power spectra of the Sloan Digital Sky Survey III (SDSS-III) Data Release 8 imaging catalog that includes 872, 921 galaxies over ~10,000 deg2 between 0.45 < z < 0.65. The extensive spectroscopic training set of the Baryon Oscillation Spectroscopic Survey luminous galaxies allows precise estimates of the true redshift distributions of galaxies in our imaging catalog. Utilizing the redshift distribution information, we build templates and fit to the power spectra of the data, which are measured in our companion paper, to derive the location of Baryon acoustic oscillations (BAOs) while marginalizing over many free parameters to exclude nearly all of the non-BAO signal. We derive the ratio of the angular diameter distance to the sound horizon scale DA (z)/rs = 9.212+0.416 - 0.404 at z = 0.54, and therefore DA (z) = 1411 ± 65 Mpc at z = 0.54; the result is fairly independent of assumptions on the underlying cosmology. Our measurement of angular diameter distance DA (z) is 1.4sigma higher than what is expected for the concordance LambdaCDM, in accordance to the trend of other spectroscopic BAO measurements for z >~ 0.35. We report constraints on cosmological parameters from our measurement in combination with the WMAP7 data and the previous spectroscopic BAO measurements of SDSS and WiggleZ. We refer to our companion papers (Ho et al. de Putter et al.) for investigations on information of the full power spectrum.

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DOI: 10.1088/0004-637x/761/1/13

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