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2014-04-04

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/101763

The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: galaxy clustering measurements in the low-redshift sample of Data Release 11

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http://dx.doi.org/10.1093/mnras/stu371

Resum

We present the distance measurement to z = 0.32 using the eleventh data release (DR) of the Sloan Digital Sky Survey-III Baryon Acoustic Oscillation Survey (BOSS). We use 313 780 galaxies of the low-redshift (LOWZ) sample over 7341 square degrees to compute D_V=(1264 ± 25) (r_d/r_{d,fid}) - a sub 2 per cent measurement - using the baryon acoustic feature measured in the galaxy two-point correlation function and power spectrum. We compare our results to those obtained in DR10. We study observational systematics in the LOWZ sample and quantify potential effects due to photometric offsets between the northern and southern Galactic caps. We find the sample to be robust to all systematic effects found to impact on the targeting of higher redshift BOSS galaxies and that the observed north-south tensions can be explained by either limitations in photometric calibration or by sample variance, and have no impact on our final result. Our measurement, combined with the baryonic acoustic scale at z = 0.57, is used in Anderson et al. to constrain cosmological parameters.

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Cosmologia, Univers, Observacions astronòmiques

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Cosmology, Universe, Astronomical observations

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Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
<b>Publicacions de projectes de recerca finançats per la UE</b>

Citació

TOJEIRO, Rita, ROSS, Ashley j., BURDEN, Angela, SAMUSHIA, Lado, MANERA, Marc, PERCIVAL, Will j., BEUTLER, Florian, CUESTA, Antonio j., DAWSON, Kyle s., EISENSTEIN, Daniel j., HO, Shirley, HOWLETT, Cullan, MCBRIDE, Cameron k., MONTESANO, Francesco, PAREJKO, John, REID, Beth a., SÁNCHEZ, Ariel g., SCHLEGEL, David j., SCHNEIDER, Donald p., TINKER, Jeremy l., VARGAS MAGAÑA, Mariana, WHITE, Martin. The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: galaxy clustering measurements in the low-redshift sample of Data Release 11. _Monthly Notices of the Royal Astronomical Society_. 2014. Vol. 440, núm. 3, pàgs. 2222-2237. [consulta: 10 de gener de 2026]. ISSN: 0035-8711. [Disponible a: https://hdl.handle.net/2445/101763]

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