### Abstract

We examine the correlation function ξ of the Sloan Digital Sky Survey Luminous Red Galaxy sample at large scales (60 h ^{-1} Mpc < s < 400h ^{-1}Mpc) using the final data release (DR7). Focusing on a quasi-volume-limited (0.16 < z < 0.36) subsample and utilizing mock galaxy catalogs, we demonstrate that the observed baryonic acoustic peak and larger scale signal are consistent with ΛCDM at 70%-95% confidence. Fitting data to a non-linear, redshift-space, template-based model, we constrain the peak position at s _{p} = 101.7 3.0h ^{-1}Mpc when fitting the range 60 h ^{-1} Mpc < s < 150h ^{-1}Mpc (1σ uncertainties). This redshift-space distance s _{p} is related to the comoving sound horizon scale r_{s} after taking into account matter-clustering non-linearities, redshift distortions, and galaxy-clustering bias. Mock catalogs show that the probability that a DR7-sized sample would not have an identifiable peak is at least 10%. As a consistency check of a fiducial cosmology, we use the observed s _{p} to obtain the distance relative to the acoustic scale. We find r_{s} /D_{V} (z = 0.278) = 0.1389 0.0043. This result is in excellent agreement with Percival et al., who examine roughly the same data set, but use the power spectrum. Comparison with other determinations in the literature are also in very good agreement. The signal of the full sample at 125 h ^{-1} Mpc < s < 200h ^{-1}Mpc tends to be high relative to theoretical expectations; this slight deviation can probably be attributed to sample variance. We have tested our results against a battery of possible systematic effects, finding all effects are smaller than our estimated sample variance.

Original language | English (US) |
---|---|

Pages (from-to) | 1444-1461 |

Number of pages | 18 |

Journal | Astrophysical Journal |

Volume | 710 |

Issue number | 2 |

DOIs | |

State | Published - 2010 |

### Fingerprint

### Keywords

- Cosmology: observations
- Distance scale
- Galaxies: elliptical and lenticular, cD
- Large-scale structure of universe

### ASJC Scopus subject areas

- Space and Planetary Science
- Astronomy and Astrophysics

### Cite this

*Astrophysical Journal*,

*710*(2), 1444-1461. https://doi.org/10.1088/0004-637X/710/2/1444

**The baryonic acoustic feature and large-scale clustering in the sloan digital sky survey luminous red galaxy sample.** / Kazin, Eyal A.; Blanton, Michael R.; Scoccimarro, Romn; McBride, Cameron K.; Berlind, Andreas A.; Bahcall, Neta A.; Brinkmann, Jon; Czarapata, Paul; Frieman, Joshua A.; Kent, Stephen M.; Schneider, Donald P.; Szalay, Alexander S.

Research output: Contribution to journal › Article

*Astrophysical Journal*, vol. 710, no. 2, pp. 1444-1461. https://doi.org/10.1088/0004-637X/710/2/1444

}

TY - JOUR

T1 - The baryonic acoustic feature and large-scale clustering in the sloan digital sky survey luminous red galaxy sample

AU - Kazin, Eyal A.

AU - Blanton, Michael R.

AU - Scoccimarro, Romn

AU - McBride, Cameron K.

AU - Berlind, Andreas A.

AU - Bahcall, Neta A.

AU - Brinkmann, Jon

AU - Czarapata, Paul

AU - Frieman, Joshua A.

AU - Kent, Stephen M.

AU - Schneider, Donald P.

AU - Szalay, Alexander S.

PY - 2010

Y1 - 2010

N2 - We examine the correlation function ξ of the Sloan Digital Sky Survey Luminous Red Galaxy sample at large scales (60 h -1 Mpc < s < 400h -1Mpc) using the final data release (DR7). Focusing on a quasi-volume-limited (0.16 < z < 0.36) subsample and utilizing mock galaxy catalogs, we demonstrate that the observed baryonic acoustic peak and larger scale signal are consistent with ΛCDM at 70%-95% confidence. Fitting data to a non-linear, redshift-space, template-based model, we constrain the peak position at s p = 101.7 3.0h -1Mpc when fitting the range 60 h -1 Mpc < s < 150h -1Mpc (1σ uncertainties). This redshift-space distance s p is related to the comoving sound horizon scale rs after taking into account matter-clustering non-linearities, redshift distortions, and galaxy-clustering bias. Mock catalogs show that the probability that a DR7-sized sample would not have an identifiable peak is at least 10%. As a consistency check of a fiducial cosmology, we use the observed s p to obtain the distance relative to the acoustic scale. We find rs /DV (z = 0.278) = 0.1389 0.0043. This result is in excellent agreement with Percival et al., who examine roughly the same data set, but use the power spectrum. Comparison with other determinations in the literature are also in very good agreement. The signal of the full sample at 125 h -1 Mpc < s < 200h -1Mpc tends to be high relative to theoretical expectations; this slight deviation can probably be attributed to sample variance. We have tested our results against a battery of possible systematic effects, finding all effects are smaller than our estimated sample variance.

AB - We examine the correlation function ξ of the Sloan Digital Sky Survey Luminous Red Galaxy sample at large scales (60 h -1 Mpc < s < 400h -1Mpc) using the final data release (DR7). Focusing on a quasi-volume-limited (0.16 < z < 0.36) subsample and utilizing mock galaxy catalogs, we demonstrate that the observed baryonic acoustic peak and larger scale signal are consistent with ΛCDM at 70%-95% confidence. Fitting data to a non-linear, redshift-space, template-based model, we constrain the peak position at s p = 101.7 3.0h -1Mpc when fitting the range 60 h -1 Mpc < s < 150h -1Mpc (1σ uncertainties). This redshift-space distance s p is related to the comoving sound horizon scale rs after taking into account matter-clustering non-linearities, redshift distortions, and galaxy-clustering bias. Mock catalogs show that the probability that a DR7-sized sample would not have an identifiable peak is at least 10%. As a consistency check of a fiducial cosmology, we use the observed s p to obtain the distance relative to the acoustic scale. We find rs /DV (z = 0.278) = 0.1389 0.0043. This result is in excellent agreement with Percival et al., who examine roughly the same data set, but use the power spectrum. Comparison with other determinations in the literature are also in very good agreement. The signal of the full sample at 125 h -1 Mpc < s < 200h -1Mpc tends to be high relative to theoretical expectations; this slight deviation can probably be attributed to sample variance. We have tested our results against a battery of possible systematic effects, finding all effects are smaller than our estimated sample variance.

KW - Cosmology: observations

KW - Distance scale

KW - Galaxies: elliptical and lenticular, cD

KW - Large-scale structure of universe

UR - http://www.scopus.com/inward/record.url?scp=77149125559&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77149125559&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/710/2/1444

DO - 10.1088/0004-637X/710/2/1444

M3 - Article

VL - 710

SP - 1444

EP - 1461

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

ER -