Results 91 to 100 of about 439,885 (243)
Environmental Effects of Dark Matter Haloes: The Clustering-Substructure relation of Group-size Haloes [PDF]
, 2007 We estimate the two-point correlation function of dark matter haloes, with masses >10^{13} h^{-1} Mo, that have or not significant substructure. The haloes are identified with a friends of friends algorithm in a large LCDM simulation at two redshift snapshots (z=0 and 1), while halo substructure is determined using an observationally driven method.
arxiv +1 more source
What is Missing from the Local Stellar Halo? [PDF]
arXiv, 2022 The Milky Way's stellar halo, which extends to $>100$ kpc, encodes the evolutionary history of our Galaxy. However, most studies of the halo to date have been limited to within a few kpc of the Sun. Here, we characterize differences between this local halo and the stellar halo in its entirety.
arxiv
The Nonlinear Evolution of Galaxy Intrinsic Alignments
, 2008 The non-Gaussian contribution to the intrinsic halo spin alignments is analytically modeled and numerically detected. Assuming that the growth of non-Gaussianity in the density fluctuations caused the tidal field to have nonlinear-order effect on the ...
Catelan P. +3 more
core +1 more source
Chemical Inhomogeneities in the Milky Way Stellar Halo
, 2008 We have compiled a sample of 699 stars from the recent literature with detailed chemical abundance information (spanning -4.2 < [Fe/H] < +0.3), and we compute their space velocities and Galactic orbital parameters.
Allende Prieto +69 more
core +1 more source
Properties of Dark Matter Halos as a Function of Local Environment Density [PDF]
, 2016 We study how properties of discrete dark matter halos depend on halo environment, characterized by the mass density around the halos on scales from 0.5 to 16 $h^{-1}{\rm Mpc}$. We find that low mass halos (those less massive than the characteristic mass $M_{\rm C}$ of halos collapsing at a given epoch) in high-density environments have lower accretion ...
arxiv +1 more source
Halo properties and secular evolution in barred galaxies
, 2005 The halo plays a crucial role in the evolution of barred galaxies. Its near-resonant material absorbs angular momentum emitted from some of the disc particles and helps the bar become stronger.
A. J. Kalnajs +18 more
core +3 more sources
The multidimensional dependence of halo bias in the eye of a machine: a tale of halo structure, assembly and environment [PDF]
, 2018 We develop a novel approach in exploring the joint dependence of halo bias on multiple halo properties using Gaussian process regression. Using a $\Lambda$CDM $N$-body simulation, we carry out a comprehensive study of the joint bias dependence on halo structure, formation history and environment. We show that the bias is a multivariate function of halo
arxiv +1 more source
The impact of filamentary accretion of subhaloes on the shape and orientation of haloes [PDF]
, 2019 Dark matter haloes are formed through hierarchical mergers of smaller haloes in large-scale cosmic environments, and thus anisotropic subhalo accretion through cosmic filaments have some impacts on halo structures. Recent studies using cosmological simulations have shown that the orientations of haloes correlate with the direction of cosmic filaments ...
arxiv +1 more source
F1000Research, 2017 Background Although preterm delivery and low birth weight (LBW) have been studied in India, findings may not be generalisable to rural areas such as the Marathwada region of Maharashtra state.
Anand Ahankari +4 more
doaj +1 more source
Determination of Dark Matter Halo Mass from Dynamics of Satellite Galaxies
, 2017 We show that the mass of a dark matter halo can be inferred from the dynamical status of its satellite galaxies. Using 9 dark-matter simulations of halos like the Milky Way (MW), we find that the present-day substructures in each halo follow a ...
Jing, Y. P. +4 more
core +1 more source