Hubble Probes the Invisible Halo of a GalaxyEducation
We model the luminosity-dependent projected two-point correlation function of DEEP2 (z~1) and SDSS (z~0) galaxies within the Halo Occupation Distribution (HOD) framework. At both epochs, there is a tight correlation between central galaxy luminosity and halo mass, with the slope and scatter ...
b.A roughly spherical region of relatively dust-free space surrounding a galaxy and extending beyond the visible parts of the galaxy. Galactic halos contain stars (often located in globular clusters), gas, and dark matter. tr.v.ha·loed,ha·lo·ing,ha·loes ...
The gravitational force field of the Galaxy measured from the kinematics of RR Lyrae in Gaia From a sample of 15651 RR Lyrae with accurate proper motions in Gaia DR2, we measure the azimuthally averaged kinematics of the inner stellar halo between ... W Christopher,G Ortwin,B Marie - 《Mon...
Synonyms of halo 1 : a circle of light appearing to surround the sun or moon and resulting from refraction or reflection of light by ice particles in the atmosphere 2 : something resembling a halo: such as a : nimbus b : a region of space surrounding a galaxy that is sparsely ...
The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We have discovered a dwarf satellite galaxy in the process of being torn apart by gravitational tidal fo...
We consider a few possible profiles for the halo gas density, self-consistently constrained by the halo mass, redshift and the disc baryonic concentration of the galaxy. We show that the outflow velocity levels off at ~10³ km s-1 within the scale of the galaxy disc. Typically, the ...
“Heroes of Reach” as a Seasonal theme for very specific reasons:Reach has a rich history; it’s a key location for Spartans of old and a focal point for a new generation of Spartans preparing to wrestle with the perils and mysteries of a galaxy that has fundamentally changed after the ...
GAMA+KiDS: Empirical correlations between halo mass and other galaxy properties near the knee of the stellar-to-halo mass relation We use KiDS weak lensing data to measure variations in mean halo mass as a function of several key galaxy properties (namely: stellar colour, specific star... EN...
Using a smoothed particle hydrodynamics (SPH) simulation and a semianalytic (SA) galaxy formation model, we examine the separate contributions of central and satellite galaxies to the HOD, more specifically to the probability P(N|M) that a halo of virial mass M contains N galaxies of a ...