منابع مشابه
The Cosmic Distribution of Clustering
For a given statistic, A, the cosmic distribution function, Υ(Ã), is the probability of measuring a value à in a finite galaxy catalog. For statistics related to count-in-cells, such as factorial moments, Fk, the average correlation function, ξ, and cumulants, SN , the functions Υ(F̃k), Υ( ̃ ξ), and Υ(S̃N ) were measured in a large τCDM simulation. This N-body experiment simulates almost the full ...
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We examine the correlation between compact radio quasars (redshifts in the range z = 0.3−2.2) and the arrival direction of ultrahigh energy cosmic rays forming clusters. Our Monte Carlo simulation reveals a statistically significant correlation on the AGASA sample: the chance probability of this effect being less than 1%. The implications of this result on the origin of ultrahigh energy cosmic ...
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Deviations from isotropy have been a key tool to identify the sources and the primary type of cosmic rays (CRs) at low energies. We argue that anisotropies due to blind regions induced by the Galactic magnetic field, the cosmological Compton-Getting effect, medium-scale anisotropies reflecting the large-scale distribution of CR sources and the small-scale clustering of the CR arrival directions...
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We employ high-resolution dissipationless simulations of the concordance ΛCDM cosmology (Ω0 = 1 − ΩΛ = 0.3, h = 0.7, σ8 = 0.9) to model the observed luminosity dependence and evolution of galaxy clustering through most of the age of the universe, from z ∼ 5 to z ∼ 0. We use a simple, nonparametric model which monotonically relates galaxy luminosities to the maximum circular velocity of dark mat...
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We consider the effect of reionization on the clustering properties of galaxy samples at intermediate redshifts (z ∼ 0.3–5.5). Current models for the reionization of intergalactic hydrogen predict that overdense regions will be reionized early, thus delaying the build up of stellar mass in the progenitors of massive lower-redshift galaxies. As a result, the stellar populations observed in inter...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2016
ISSN: 1029-8479
DOI: 10.1007/jhep06(2016)181