Results 41 to 50 of about 113,784 (303)

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

The structure of dissipative dark matter halos [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
Dissipative dark matter self-interactions can affect halo evolution and change its structure. We perform a series of controlled N-body simulations to study impacts of the dissipative interactions on halo properties. The interplay between gravitational contraction and collisional dissipation can significantly speed up the onset of gravothermal collapse,
Huo, Ran, Yu, Hai-Bo, Zhong, Yi-Ming
openaire   +2 more sources

Encounters between spherical galaxies II: systems with dark halo [PDF]

, 2005
We performe N-body simulations of encounters between spherical systems surrounded by a spherical halo. Following a preceding paper with a similar aim, the initial systems include a spherical Jaffe model for the luminous matter and a Hernquist model for ...
A. C. González-García, Alam, Baes, Bak, Barnes, Binney, Binney, Dantas, Davies, de Zeeuw, Dehnen, Fish, Franx, González-García, Hernquist, Hernquist, Hernquist, Jaffe, Jørgensen, Keeton, Kelm, Klypin, Kronawitter, Lambas, Matsushita, Moore, Napolitano, Renzini, Romanowsky, Romanowsky, Ryden, Saglia, Saglia, Shioya, T. S. van Albada, Vincent   +35 more
core   +9 more sources

Mapping substructures in dark matter haloes [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2005
Abstract We present a detailed study of the real and integrals-of-motion space distributions of a disrupting satellite obtained from a fully self-consistent high-resolution cosmological simulation of a galaxy cluster. The satellite has been re-simulated using various analytical halo potentials, and we find that its debris appears as a ...
Knebe, Alexander, Gill, Stuart P., Kawata, Daisuke, Gibson, Brad K.   +3 more
openaire   +3 more sources

A vertically orientated dark matter halo marks a flip of the Galactic disc

Astronomy & Astrophysics
Unveiling the 3D shape of the Milky Way’s dark-matter halo is critical to understanding its formation history. We created an innovative dynamical model that makes minimal assumptions about the internal dynamical structures and accommodates a highly ...
Zhu Ling, Cai Runsheng, Kang Xi, Xue Xiang-Xiang, Yang Chengqun, Zhang Lan, Mao Shude, Liu Chao   +7 more
doaj   +1 more source

A simple analytical model for dark matter halo structure and adiabatic contraction

, 2006
A simple analytical model for describing inner parts of dark matter halo is considered. It is assumed that dark matter density is power-law. The model deals with dark matter distribution function in phase space of adiabatic invariants (radial action and ...
A. V. Gurevich, C. Austin, E. A. Vasil’ev, G. Bertone, G. Blumenthal, G. Mamon, H. Zhao, J. An, J. Binney, J. Diemand, J. Navarro, J. Sellwood, J. Taylor, M. I. Zel’nikov, O. Gnedin, P. Gondolo, S. Hansen, S. Hansen, S. Hansen, S. Kazantzidis, V. Cardone, W. Dehnen, W. Dehnen   +22 more
core   +1 more source

Does stellar mass assembly history vary with environment? [PDF]

, 2011
Using the publicly available VESPA database of SDSS Data Release 7 spectra, we calculate the stellar Mass Weighted Age (hereafter MWA) as a function of local galaxy density and dark matter halo mass.
Hoyle, Ben, Jimenez, Raul, Verde, Licia
core   +2 more sources

Dark matter bars in spinning haloes [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT We study non-linear response of spinning dark matter (DM) haloes to dynamic and secular evolution of stellar bars in the embedded galactic discs, using high-resolution numerical simulations. For a sequence of haloes with the cosmological spin parameter λ = 0–0.09, and a representative angular momentum distribution, we analyse ...
Angela Collier, Isaac Shlosman, Clayton Heller   +2 more
openaire   +2 more sources

DARK ENERGY AND KEY PHYSICAL PARAMETERS OF CLUSTERS OF GALAXIES

Odessa Astronomical Publications, 2012
We discuss the physics of clusters of galaxies embedded in the cosmic dark energy background and show that 1) the halo cut-off radius of a cluster like the Virgo cluster is practically, if not exactly, equal to the zero-gravity radius at which the dark ...
A. D. Chernin, G. S. Bisnovatyi-Kogan
doaj   +1 more source

Time delay of light in the gravitational lensing of supermassive black holes in dark matter halos

European Physical Journal C: Particles and Fields
The dark matter halo has non-negligible effects on the gravitational lensing of supermassive black hole in the galaxy center. Our work presents a study on the time-delay of light in gravitational lensing of black holes enclosed by dark matter halos.
Chen-Kai Qiao, Ping Su
doaj   +1 more source