### Abstract

Cosmological tests based on the statistical analysis of galaxy distributions usually depend on source evolution. An exception is the Alcock–Paczyński (AP) test, which is based on the changing ratio of angular to spatial/redshift size of (presumed) spherically-symmetric source distributions with distance. Intrinsic redshift distortions due to gravitational effects may also have an influence, but they can now be overcome with the inclusion of a sharp feature, such as the Baryonic Acoustic Oscillation (BAO) peak. Redshift distortions affect the amplitude of the peak, but impact its position only negligibly. As we shall show here, the use of this diagnostic, with new BAO peaks from SDSS-III/BOSS at average redshifts (Formula presented.), (Formula presented.) and (Formula presented.), disfavors the current concordance ((Formula presented.)CDM) model at (Formula presented.). Within the context of expanding Friedmann–Robertson–Walker (FRW) cosmologies, these data instead favor the zero active mass equation-of-state, (Formula presented.), where (Formula presented.) and (Formula presented.) are, respectively, the total density and pressure of the cosmic fluid, the basis for the (Formula presented.) universe.

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

Journal | International Journal of Modern Physics D |

DOIs | |

State | Accepted/In press - 2016 |

### Fingerprint

### Keywords

- cosmological parameters
- Cosmology
- cosmology: distance scale
- cosmology: observations
- quasars: general

### ASJC Scopus subject areas

- Mathematical Physics
- Astronomy and Astrophysics
- Space and Planetary Science

### Cite this

*International Journal of Modern Physics D*. https://doi.org/10.1142/S0218271817500559

**Alcock–Paczyński test with model-independent BAO data.** / Melia, Fulvio; López-Corredoira, M.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Alcock–Paczyński test with model-independent BAO data

AU - Melia, Fulvio

AU - López-Corredoira, M.

PY - 2016

Y1 - 2016

N2 - Cosmological tests based on the statistical analysis of galaxy distributions usually depend on source evolution. An exception is the Alcock–Paczyński (AP) test, which is based on the changing ratio of angular to spatial/redshift size of (presumed) spherically-symmetric source distributions with distance. Intrinsic redshift distortions due to gravitational effects may also have an influence, but they can now be overcome with the inclusion of a sharp feature, such as the Baryonic Acoustic Oscillation (BAO) peak. Redshift distortions affect the amplitude of the peak, but impact its position only negligibly. As we shall show here, the use of this diagnostic, with new BAO peaks from SDSS-III/BOSS at average redshifts (Formula presented.), (Formula presented.) and (Formula presented.), disfavors the current concordance ((Formula presented.)CDM) model at (Formula presented.). Within the context of expanding Friedmann–Robertson–Walker (FRW) cosmologies, these data instead favor the zero active mass equation-of-state, (Formula presented.), where (Formula presented.) and (Formula presented.) are, respectively, the total density and pressure of the cosmic fluid, the basis for the (Formula presented.) universe.

AB - Cosmological tests based on the statistical analysis of galaxy distributions usually depend on source evolution. An exception is the Alcock–Paczyński (AP) test, which is based on the changing ratio of angular to spatial/redshift size of (presumed) spherically-symmetric source distributions with distance. Intrinsic redshift distortions due to gravitational effects may also have an influence, but they can now be overcome with the inclusion of a sharp feature, such as the Baryonic Acoustic Oscillation (BAO) peak. Redshift distortions affect the amplitude of the peak, but impact its position only negligibly. As we shall show here, the use of this diagnostic, with new BAO peaks from SDSS-III/BOSS at average redshifts (Formula presented.), (Formula presented.) and (Formula presented.), disfavors the current concordance ((Formula presented.)CDM) model at (Formula presented.). Within the context of expanding Friedmann–Robertson–Walker (FRW) cosmologies, these data instead favor the zero active mass equation-of-state, (Formula presented.), where (Formula presented.) and (Formula presented.) are, respectively, the total density and pressure of the cosmic fluid, the basis for the (Formula presented.) universe.

KW - cosmological parameters

KW - Cosmology

KW - cosmology: distance scale

KW - cosmology: observations

KW - quasars: general

UR - http://www.scopus.com/inward/record.url?scp=84997040279&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84997040279&partnerID=8YFLogxK

U2 - 10.1142/S0218271817500559

DO - 10.1142/S0218271817500559

M3 - Article

JO - International Journal of Modern Physics D

JF - International Journal of Modern Physics D

SN - 0218-2718

ER -