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The Cosmological Constant and Dark Energy
Physics invites the idea that space contains energy whose gravitational effect approximates that of Einstein's cosmological constant, Lambda: nowadays the concept is termed dark energy or
Cosmology with a Time Variable Cosmological Constant
Description d'une cosmologie basee sur une constante cosmologique Λ decroissante avec le temps quand l'energie potentielle du champ scalaire φ possede une queue en loi de puissance V∼φ − α pour φ
Cosmological 'seed' magnetic field from inflation
We extend the canonical exponential potential scalar field inflation modified hot big bang model by adding an inflation epoch coupling, between the scalar field Φ responsible for inflation and an
We compile a list of 28 independent measurements of the Hubble parameter between redshifts 0.07 ≤ z ≤ 2.3 and use this to place constraints on model parameters of constant and time-evolving dark
Median Statistics and the Hubble Constant
ABSTRACT.Following Gott et al., we use Huchra’s final compilation of 553 measurements of the Hubble constant (H0H0) to estimate median statistical constraints on H0H0. Our median statistical analysis
Median Statistics Estimate of the Distance to the Galactic Center
We show that error distributions of a compilation of 28 recent independent measurements of the distance from the Sun to the Galactic center, $R_{0}$, are wider than a standard Gaussian and best fit
Cosmic Microwave Background Anisotropy in COBE DMR-normalized Open and Flat-Λ Cold Dark Matter Cosmogonies
We compute the cosmic microwave background (CMB) anisotropy in open and flat-Λ cold dark matter (CDM) cosmogonies which are normalized to the two-year DMR sky maps. Presently available CMB data are
Hubble Parameter and Baryon Acoustic Oscillation Measurement Constraints on the Hubble Constant, the Deviation from the Spatially Flat ΛCDM Model, the Deceleration–Acceleration Transition Redshift,
We compile a complete collection of reliable Hubble parameter H(z) data to redshift z ≤ 2.36 and use them with the Gaussian Process method to determine continuous H(z) functions for various data
Median Statistics, H0, and the Accelerating Universe
We develop median statistics that provide powerful alternatives to χ2 likelihood methods and require fewer assumptions about the data. Application to astronomical data demonstrates that median
Large-scale structure in COBE-normalized cold dark matter cosmogonies
We study the clustering of the mass distribution in COBE-normalized open and flat CDM models using large N-body simulations. With an age of the universe of 14 Gyr (12 Gyr) for the flat (open) models