scholarly journals Gravitational lensing effects on the baryonic acoustic oscillation signature in the redshift-space correlation function

2010 ◽  
Vol 82 (4) ◽  
Author(s):  
Jaiyul Yoo ◽  
Jordi Miralda-Escudé
Keyword(s):  
Correlation Function ◽  
Gravitational Lensing ◽  
Acoustic Oscillation ◽  
Space Correlation ◽  
Baryonic Acoustic Oscillation

scholarly journals Baryon acoustic oscillations signature in the three-point angular correlation function from the SDSS-DR12 quasar survey

2020 ◽  
Vol 492 (3) ◽  
pp. 4469-4476 ◽  
Author(s):  
E de Carvalho ◽  
A Bernui ◽  
H S Xavier ◽  
C P Novaes
Keyword(s):  
Correlation Function ◽  
Angular Correlation ◽  
Statistical Significance ◽  
Acoustic Oscillation ◽  
Sloan Digital Sky Survey ◽  
Similar Data ◽  
Acoustic Oscillations ◽  
Data Set ◽  
A Value ◽  
Angular Correlation Function

ABSTRACT The clustering properties of the Universe at large scales are currently being probed at various redshifts through several cosmological tracers and with diverse statistical estimators. Here we use the three-point angular correlation function (3PACF) to probe the baryon acoustic oscillation (BAO) features in the quasars catalogue from the Sloan Digital Sky Survey Data Release 12, with mean redshift $\overline{z} = 2.225$, detecting the BAO imprint with a statistical significance of $2.9 \sigma$, obtained using lognormal mocks. Following a quasi-model-independent approach for the 3PACF, we find the BAO transversal signature for triangles with sides θ1 = $1{^{\circ}_{.}}0$ and θ2 = $1{^{\circ}_{.}}5$ and the angle between them of α = 1.59 ± 0.17 rad, a value that corresponds to the angular BAO scale $\theta_{\rm BAO}=1{^{\circ}_{.}}82 \pm 0{^{\circ}_{.}}21$, in excellent agreement with the value found in a recent work ($\theta_{\rm BAO}=1{^{\circ}_{.}}77 \pm 0{^{\circ}_{.}}31$) applying the two-point angular correlation function (2PACF) to similar data. Moreover, we performed two types of test: one to confirm the robustness of the BAO signal in the 3PACF through random displacements in the data set, and the other to verify the suitability of our random samples, a null test that in fact does not show any signature that could bias our results.

scholarly journals OBSERVATIONAL H(z) DATA AS A COMPLEMENTARITY TO OTHER COSMOLOGICAL PROBES

2009 ◽  
Vol 24 (21) ◽  
pp. 1699-1709 ◽  
Author(s):  
HUI LIN ◽  
CHENG HAO ◽  
XIAO WANG ◽  
QIANG YUAN ◽  
ZE-LONG YI ◽  
...  
Keyword(s):  
Cosmic Microwave Background ◽  
Acoustic Oscillation ◽  
Microwave Background ◽  
Shift Parameter ◽  
Data Set ◽  
Flat Universe ◽  
Baryonic Acoustic Oscillation ◽  
Cosmological Observations

In this paper, we use a set of observational H(z) data (OHD) to constrain the ΛCDM cosmology. This data set can be derived from the differential ages of the passively evolving galaxies. Meanwhile, the [Formula: see text]-parameter, which describes the Baryonic Acoustic Oscillation (BAO) peak, and the newly measured value of the Cosmic Microwave Background (CMB) shift parameter [Formula: see text] are used to present combinational constraints on the same cosmology. The combinational constraints favor an accelerating flat universe while the flat ΛCDM cosmology is also analyzed in the same way. We obtain a result compatible with that by many other independent cosmological observations. We find that the observational H(z) data set is a complementarity to other cosmological probes.

scholarly journals The clustering of hot and cold IRAS galaxies: the redshift-space correlation function

2001 ◽  
Vol 325 (2) ◽  
pp. 589-598 ◽  
Author(s):  
E. Hawkins ◽  
S. Maddox ◽  
E. Branchini ◽  
W. Saunders
Keyword(s):  
Correlation Function ◽  
Space Correlation

scholarly journals Detection of baryon acoustic oscillation features in the large-scale three-point correlation function of SDSS BOSS DR12 CMASS galaxies

2017 ◽  
Vol 469 (2) ◽  
pp. 1738-1751 ◽  
Author(s):  
Zachary Slepian ◽  
Daniel J. Eisenstein ◽  
Joel R. Brownstein ◽  
Chia-Hsun Chuang ◽  
Héctor Gil-Marín ◽  
...  
Keyword(s):  
Correlation Function ◽  
Large Scale ◽  
Acoustic Oscillation ◽  
Baryon Acoustic Oscillation ◽  
Point Correlation ◽  
Point Correlation Function

scholarly journals Possible Inhomogeneities in the Universe on Scales of 100–300 MPC from Observations with the 6-Meter Telescope

1988 ◽  
Vol 130 ◽  
pp. 129-137
Author(s):  
A. I. Kopylov ◽  
D. Yu. Kuznetsov ◽  
T. S. Fetisova ◽  
V. F. Shvartsman
Keyword(s):  
Correlation Function ◽  
Hubble Constant ◽  
Galactic Latitude ◽  
Clusters Of Galaxies ◽  
Space Correlation ◽  
Point Space ◽  
Topology Of The Universe ◽  
The Universe

In 1986 the programme “The Northern Cone of Metagalaxy” has been finished with the 6-meter Telescope. In the course of the programme redshifts of all very rich compact clusters of galaxies inside the cone with galactic latitude and indirect estimates of redshifts ZLB < 0.28 have been measured. The total volume of the investigated region is V ≈ 500·106 Mpc3 (we accept Hubble constant H=50 km/s Mpc−1). A number of possible indications of existence of inhomogeneities in the Universe on scales greater than 100 Mpc are obtained: 1) the void of 400 Mpc in size; 2) the flat stratum of 150 Mpc thickness and 1000 Mpc diameter; 3) two-point space correlation function ξ (R = 200–300 Mpc) = 0.5±0.2. We found no indications that topology of the Universe is non-Euclidean on scales of 20–200 Mpc.

A Theory Research of Asphalt Pavement Dynamic Response under Vehicle Random Stimulation

2011 ◽  
Vol 105-107 ◽  
pp. 13-19
Author(s):  
Xiao Yun Liu ◽  
Chun Juan Shi ◽  
Shui Jing Chen
Keyword(s):  
Correlation Function ◽  
Analytical Solution ◽  
Dynamic Response ◽  
Asphalt Pavement ◽  
Mathematic Model ◽  
Square Function ◽  
Random Response ◽  
Space Correlation ◽  
Time Space ◽  
Function Time

In order to study the dynamic response of the asphalt pavement under vehicle random stimulation, the random vibration model of vehicles and the mathematic model of pavement dynamic response in which the base and surface are all viscoelasticity are established respectively. The analytical solution of the stochastic response for the pavement is deduced. The stochastic load acted on the pavement can be gotten by the mathematic model of the vehicle vibration. The numeral feature functions of the random response, such as even function, time-space correlation function, time correlation function and mean square function, are obtained by the analytical solution. The paper provides a theory method for studying the random response of the asphalt pavement.

scholarly journals Fourier- Filtering Techniques for the Analysis of High- Resolution Pulsed Neutron Powder Diffraction Data

1985 ◽  
Vol 29 ◽  
pp. 143-152 ◽  
Author(s):  
James W. Richardson ◽  
John Faber
Keyword(s):  
Correlation Function ◽  
High Resolution ◽  
Diffraction Data ◽  
Real Space ◽  
Space Correlation ◽  
Crystalline Materials ◽  
Neutron Powder Diffraction Data ◽  
Fourier Filtering ◽  
Two Phases ◽  
Pulsed Neutron

AbstractRietveld profile refinements using high-resolution pulsed neutron povder diffraction data, collected at IPNS, often reveal broad intensity contributions from sources other than the crystalline materials being studied. Such non-crystalline intensity hampers standard Rietveld refinement, and its removal and/or identification is imperative for successful refinement of the crystalline structure. A Fourier-filtering technique allows removal of the non-crystalline scattering contributions to the overall scattering pattern and yields information about the noncrystalline material. In particular, Fourier transformation of residual intensities not accounted for by the Rietveld procedure results in a real-space correlation function similar to a radial distribution function (RDF). From the inverse Fourier transform of the correlation function a Fourier-filtered fit to the diffuse scattering is obtained. This mathematical technique was applied to data for crystalline quartz, amorphous silica, and to a simulated diffraction pattern for a mixture of the two phases.

Sign in / Sign up

Export Citation Format

Share Document