Results 11 to 20 of about 2,655,258 (212)
Dark energy and dark matter in galaxy halos
Physics Letters B, 2006 We consider the possibility that the dark matter is coupled through its mass to a scalar field associated with the dark energy of the Universe. In order for such a field to play a role at the present cosmological distances, it must be effectively ...
Tetradis, N
core +5 more sources
The GD-1 Stellar Stream Perturber as a Core-collapsed Self-interacting Dark Matter Halo [PDF]
The Astrophysical Journal LettersThe GD-1 stellar stream exhibits spur and gap structures that may result from a close encounter with a dense substructure. When interpreted as a dark matter subhalo, the perturber is denser than predicted in the standard cold dark matter (CDM) model.
Xingyu Zhang +3 more
doaj +2 more sources
Galaxy Galaxy Lensing as a Probe of Galaxy Dark Matter Halos
, 2006 8 pages, 5 figures, to appear in Moriond Proceedings, From Dark Halos to LightGravitational lensing has now become a popular tool to measure the mass distribution of structures in the Universe on various scales.
Natarajan, P., Limousin, M., Kneib, J-P.
core +5 more sources
Limits on spin-dependent WIMP-proton cross-sections using the DRIFT-IId directional dark matter detector [PDF]
, 2011 The nature of dark matter remains one of the biggest questions in physics today. Weakly Interacting Massive Particles (WIMPs) are a particularly well motivated candidate for the missing matter that makes up 85% of the mass of the Universe.
Pipe, Mark
core +6 more sources
The dark matter haloes of HI selected galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present the neutral hydrogen mass (MHI) function (HIMF) and velocity width (w50) function (HIWF) based on a sample of 7857 galaxies from the 40 per cent data release of the ALFALFA survey (α.40). The low mass (velocity width) end of the HIMF (HIWF) is dominated by the blue population of galaxies whereas the red population ...
Saili Dutta +2 more
openaire +2 more sources
The Galaxy Number Density Profile of Halos
The Astrophysical Journal, 2023 More precise measurements of galaxy clustering will be provided by the next generation of galaxy surveys, such as DESI, WALLABY, and the Square Kilometre Array.
Fei Qin +3 more
doaj +1 more source
Cuspy dark matter haloes and the Galaxy [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 5 pages, 1 figures, MNRAS (submitted)
Binney, J, Evans, N
openaire +3 more sources
Tilted Dark Halos Are Common and Long-lived, and Can Warp Galactic Disks
The Astrophysical Journal Letters, 2023 In the Lambda cold dark matter paradigm, the dark halo governs the gravitational potential within which a galaxy can form and evolve. In this Letter we show that the present-day inner ( r < 50 kpc) dark halo can be significantly misaligned with the ...
Jiwon Jesse Han +3 more
doaj +1 more source
MAGNIFICATION BY GALAXY GROUP DARK MATTER HALOS [PDF]
The Astrophysical Journal, 2012 We report on the detection of gravitational lensing magnification by a population of galaxy groups, at a significance level of 4.9 sigma. Using X-ray selected groups in the COSMOS 1.64 deg^2 field, and high-redshift Lyman break galaxies as sources, we measure a lensing-induced angular cross-correlation between the samples.
Ford, Jes +8 more
openaire +4 more sources
The evolution of the galaxy content of dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We use the halo occupation distribution (HOD) framework to characterise the predictions from two independent galaxy formation models for the galactic content of dark matter haloes and its evolution with redshift. Our galaxy samples correspond to a range of fixed number densities defined by stellar mass and span $0 \le z \le 3$.
Contreras, S. +4 more
openaire +3 more sources