Results 51 to 60 of about 427,202 (211)
X-ray sources as tracers of the large-scale structure in the Universe
, 2000 We review the current status of studies of large-scale structure in the X-ray Universe. After motivating the use X-rays for cosmological purposes, we discuss the various approaches used on different angular scales including X-ray background multipoles ...
Barcons, X. +3 more
core +2 more sources
Testing the Strong Equivalence Principle. II. Relating the External Field Effect in Galaxy Rotation Curves to the Large-scale Structure of the Universe [PDF]
, 2021 Kyu‐Hyun Chae +4 more
openalex +1 more source
The Astrophysical JournalWe apply a halo velocity bias model, γ _f , within the Aemulus simulation suite for General Relativity to investigate its efficacy in identifying the signature of assembly bias and Modified Gravity (MG).
Yirong Wang +3 more
doaj +1 more source
Lagrangian Perturbation Theory for Biased Tracers: Significance of the Number Conservation
The Astrophysical JournalThe Lagrangian perturbation theory provides a simple yet powerful way of computing the nonlinear matter power spectrum, and it has been applied to biased tracers such as halos and galaxies.
Peter Espenshade, Jaiyul Yoo
doaj +1 more source
The Astrophysical JournalWe present a method to quantify the convergence rate of the fast estimators of the covariance matrices in the large-scale structure analysis. Our method is based on the Kullback–Leibler (KL) divergence, which describes the relative entropy of two ...
Zhigang Li +3 more
doaj +1 more source
The Astrophysical Journal, 2023 The apparent shape of galaxy clustering depends on the adopted cosmology used to convert observed redshift to comoving distance, the r ( z ) relation, as it changes the line elements along and across the line of sight differently.
Fuyu Dong +6 more
doaj +1 more source
The Astrophysical JournalA numerical detection of the τ -driven transition of galaxy spins is presented, where τ is the degree of misalignment between the initial tidal field and protogalaxy inertia tensors.
Jun-Sung Moon, Jounghun Lee
doaj +1 more source
The large scale structure of the universe
Nuclear Physics B, 1985 Abstract Observational data on galaxies and clusters of galaxies are reviewed in the context of how they relate to the large scale structure of the Universe. Various methods of interpreting these data are discussed.
openaire +1 more source
AI-powered Reconstruction of Dark Matter Velocity Fields from Redshift-space Halo Distribution
The Astrophysical JournalWe propose a UNet-based deep learning model to reconstruct the real-space dark matter (DM) velocity field from the redshift-space distribution of sparse DM halos.
Xu Xiao +8 more
doaj +1 more source
Cosmological evolution of the gravitational entropy of the large-scale structure
, 2015 We consider the entropy associated with the large-scale structure of the Universe in the linear regime, where the Universe can be described by a perturbed Friedmann-Lema\^itre spacetime. In particular, we compare two different definitions proposed in the
Clarkson, Chris +3 more
core +2 more sources