Results 41 to 50 of about 3,127,622 (352)
Prospects for 21 cm Galaxy Cross-correlations with HERA and the Roman High-latitude Survey
The Astrophysical Journal, 2023 The cross-correlation between the 21 cm field and the galaxy distribution is a potential probe of the Epoch of Reionization (EoR). The 21 cm signal traces neutral gas in the intergalactic medium and, on large spatial scales, this should be anticorrelated
Paul La Plante +4 more
doaj +1 more source
The Line-of-Sight Analysis of Spatial Distribution of Galaxies in the COSMOS2015 Catalogue
Universe, 2020 New observations of high-redshift objects are crucial for the improvement of the standard ΛCDM cosmological model and our understanding of the Universe.
Maxim Nikonov +4 more
doaj +1 more source
Machine-learning Cosmology from Void Properties
The Astrophysical Journal, 2023 Cosmic voids are the largest and most underdense structures in the Universe. Their properties have been shown to encode precious information about the laws and constituents of the Universe.
Bonny Y. Wang +3 more
doaj +1 more source
Intrinsic uncertainty on the nature of dark energy [PDF]
, 2013 We argue that there is an intrinsic noise on measurements of the equation of state parameter $w=p/\rho$ from large-scale structure around us. The presence of the large-scale structure leads to an ambiguity in the definition of the background universe and
Kunz, Martin +2 more
core +2 more sources
The Astrophysical Journal, 2023 We present CAMELS-ASTRID, the third suite of hydrodynamical simulations in the Cosmology and Astrophysics with MachinE Learning (CAMELS) project, along with new simulation sets that extend the model parameter space based on the previous frameworks of ...
Yueying Ni +14 more
doaj +1 more source
Some Considerations on Universality [PDF]
EPTCS 1, 2009, pp. 118-122, 2009 The paper puts into discussion the concept of universality, in particular for structures not of the power of Turing computability. The question arises if for such structures a universal structure of the same kind exists or not. For that the construction of universal Turing machines and those with some constraints are presented in some detail.
arxiv +1 more source
The intergalactic Newtonian gravitational field and the shell theorem [PDF]
Serbian Astronomical Journal, 2012 The release of the 2MASS Redshift Survey (2MRS) with its 44599 galaxies allows the deduction of their masses in nearly complete sample. A cubic box with side of 37 Mpc containing 2429 galaxies is extracted and the Newtonian gravitational field ...
Zaninetti L.
doaj +1 more source
Galaxy Clusters: Cosmic High-Energy Laboratories to Study the Structure of Our Universe [PDF]
, 2001 This contribution illustrates the study of galaxy clusters as astrophysical laboratories as well as probes for the large-scale structure of the Universe.
Boehringer, Hans
core +3 more sources
Turbulent geodynamo simulations: a leap towards Earth's core [PDF]
, 2017 We present an attempt to reach realistic turbulent regime in direct numerical simulations of the geodynamo. We rely on a sequence of three convection-driven simulations in a rapidly rotating spherical shell. The most extreme case reaches towards the Earth's core regime by lowering viscosity (magnetic Prandtl number Pm=0.1) while maintaining vigorous ...
arxiv +1 more source
Topological Defects and the Formation of Structure in the Universe [PDF]
, 1996 Topological defects, in particular cosmic strings, give rise to an interesting mechanism for generating the primordial perturbations in the early Universe which are required to explain the present structure. An overview of the cosmic string model will be
Brandenberger, Robert H.
core +3 more sources