scholarly journals Cosmological discordances. II. Hubble constant, Planck and large-scale-structure data sets

2017 ◽  
Vol 96 (8) ◽  
Author(s):  
Weikang Lin ◽  
Mustapha Ishak
Keyword(s):  
Structure Data ◽  
Large Scale ◽  
Hubble Constant ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Data Sets

scholarly journals Abell Clusters as Tracers of Large-Scale Structure: Alignments and Substructure

1988 ◽  
Vol 130 ◽  
pp. 536-536
Author(s):  
G. Rhee ◽  
P. Katgert
Keyword(s):  
Structure Data ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Abell Clusters

Binggeli (A & A, 107, 338, 1982) showed that neighbouring Abell clusters with pair distances less than 30 to 40 h50−1 Mpc show directional correlation. Binggeli's result is based on structure data of 44 Abell clusters (all with zspectr < 0.1). Binggelli's result was questioned by Struble and Peebles (A.J., 90, 582, 1985). They produce a visual estimate of the direction of cluster elongation for 237 clusters. They did not observe reduced probability for small D large Θ pairs.

scholarly journals Constraints on neutrino-dark matter interactions from cosmic microwave background and large scale structure data

2010 ◽  
Vol 81 (4) ◽  
Author(s):  
Paolo Serra ◽  
Federico Zalamea ◽  
Asantha Cooray ◽  
Gianpiero Mangano ◽  
Alessandro Melchiorri
Keyword(s):  
Dark Matter ◽  
Cosmic Microwave Background ◽  
Structure Data ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Microwave Background

The Large Scale Structure Peak as a Comoving Standard Ruler

2005 ◽  
Vol 201 ◽  
pp. 388-391
Author(s):  
Boudewijn F. Roukema ◽  
Gary A. Mamon
Keyword(s):  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Data Sets ◽  
Density Parameter ◽  
Observable Universe ◽  
Standard Candle ◽  
Type Ia ◽  
Density Perturbations ◽  
Empirical Standard

Estimates of the curvature parameters Ω0 (density parameter) and Δ0 (cosmological constant) can be made geometrically by use of either a standard candle or a standard ruler. Just as supernovae of Type Ia appear to provide a good empirical standard candle, it now appears observationally justified to use the peak in the power spectrum of density perturbations at L ≍ 130±10h-1 Mpc as an empirical standard rod. It will be shown that voids of this size are traced by quasars in a homogeneous catalogue near the South Galactic Pole at z ˜ 2 and that the large scale structure peak of the catalogue constrains the value of Ω0 to 0.1 < Ω0 < 0.45 (68% confidence), independently of Δ0. Combination with the supernovae Ia data is sufficient to show that the observable Universe is almost flat. In other words, the combination of a standard ruler and a standard candle detected in two presently available data sets is sufficient to show that the Universe is nearly flat, independently of any microwave background data or any other data analyses.

scholarly journals The Fractal Turbulence and the Origin of Large Scale Structure

1988 ◽  
Vol 130 ◽  
pp. 553-553
Author(s):  
Y.-Z. Liu ◽  
Z.-G. Deng
Keyword(s):  
Early Universe ◽  
Large Scale ◽  
Hubble Constant ◽  
Large Scale Structure ◽  
Thomson Scattering ◽  
Scale Structure ◽  
Scale Free ◽  
Density Perturbations ◽  
Reynold’S Number ◽  
The Universe

We have suggested a scenario of fractal turbulence which might explain the origin of galaxies and the observed large scale structure of the universe (Liu and Deng, 1987). Under the condition of the early universe, the cosmic fluid can be regarded as incompressible. If we assume that the density perturbations in the early universe are adiabatic and have the scale-free Zeldovich spectrum, we may obtain the spectrum of the velocity perturbations. Perturbations with scales less than horizon will undergo dissipative process by Thomson scattering. So, the cosmic fluid can be considered as a viscous fluid (Peebles, 1971). We can find the largest and smallest scale of the perturbations in the cosmic fluid by taking account of the Reynold's number on given scale and the scale of horizon. Using the present values of Hubble constant and the mean density of matter, we have found that on the scale of horizon the Reynold's number is just the order of 102. This result shows that perturbations with scale a little smaller than horizon may produce Karman vortices before recombination and the vortices might form fractal turbulence due to Thomson drag.

scholarly journals Probing features in the primordial perturbation spectrum with large-scale structure data

2018 ◽  
Vol 477 (2) ◽  
pp. 2503-2512 ◽  
Author(s):  
Benjamin L'Huillier ◽  
Arman Shafieloo ◽  
Dhiraj Kumar Hazra ◽  
George F Smoot ◽  
Alexei A Starobinsky
Keyword(s):  
Structure Data ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Perturbation Spectrum

scholarly journals The growth of density perturbations in the last ∼10 billion years from tomographic large-scale structure data

2021 ◽  
Vol 2021 (10) ◽  
pp. 030
Author(s):  
Carlos García-García ◽  
Jaime Ruiz-Zapatero ◽  
David Alonso ◽  
Emilio Bellini ◽  
Pedro G. Ferreira ◽  
...  
Keyword(s):  
Structure Data ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Density Perturbations
Sign in / Sign up

Export Citation Format

Share Document