Results 81 to 90 of about 213,451 (373)

The Response of the Inner Dark Matter Halo to Stellar Bars

Galaxies
Barred galaxies constitute about two-thirds of observed disc galaxies. Bars affect not only the mass distribution of gas and stars but also that of the dark matter. An elongation of the inner dark matter halo is known as the halo bar.
Daniel A. Marostica, Rubens E. G. Machado, E. Athanassoula, T. Manos   +3 more
doaj   +1 more source

THE MILKY WAY TOMOGRAPHY WITH SLOAN DIGITAL SKY SURVEY. V. MAPPING THE DARK MATTER HALO [PDF]

, 2014
We present robust constraints from the Sloan Digital Sky Survey (SDSS) on the shape and distribution of the dark matter halo within the Milky Way (MW).
S. Loebman, Ž. Ivezić, T. Quinn, J. Bovy, C. Christensen, M. Jurić, R. Roskar, A. Brooks, F. Governato   +8 more
semanticscholar   +1 more source

Disentangling the dark matter halo from the stellar halo [PDF]

Monthly Notices of the Royal Astronomical Society, 2011
The outer haloes of the Milky Way and Andromeda galaxies contain as much important information on their assembly and formation history as the properties of the discs resident in their centres. In this paper we have used the Constrained Local UniversE Simulation project to disentangle the stellar and DM component of three galaxies that resemble the MW ...
Libeskind, Noam I., Knebe, Alexander, Hoffman, Yehuda, Gottlöber, Stefan, Yepes Alonso, Gustavo   +4 more
openaire   +5 more sources

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

The Milky Way’s Circular Velocity Curve to 60 kpc and an Estimate of the Dark Matter Halo Mass from the Kinematics of ~2400 SDSS Blue Horizontal-Branch Stars [PDF]

, 2008
We derive new constraints on the mass of the Milky Way’s dark matter halo, based on 2401 rigorously selected blue horizontal-branch halo stars from SDSS DR6.
X. Xue, X. Xue, H. Rix, Gang Zhao, P. Fiorentin, P. Fiorentin, T. Naab, Matthias Steinmetz, F. C. V. D. Bosch, T. Beers, Y. S. Lee, Eric F. Bell, C. Rockosi, B. Yanny, H. Newberg, R. Wilhelm, Xi Kang, M. Smith, D. P. Schneider   +18 more
semanticscholar   +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

A dark matter scaling relation from mirror dark matter [PDF]

, 2013
Mirror dark matter, and other similar dissipative dark matter candidates, need an energy source to stabilize dark matter halos in spiral galaxies. It has been suggested previously that ordinary supernovae can potentially supply the required energy.
Foot, R.
core   +2 more sources

Network topology drives population temporal variability in experimental habitat networks

Population Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu, J. Angus Webb, William D. Bovill, Elise L. King   +3 more
wiley   +1 more source

How Do the Velocity Anisotropies of Halo Stars, Dark Matter, and Satellite Galaxies Depend on Host Halo Properties?

The Astrophysical Journal
We investigate the mass ( M _200 ) and concentration ( c _200 ) dependencies of the velocity anisotropy ( β ) profiles for different components in the dark matter halo—including halo stars, dark matter, and subhalos—using systems from the IllustrisTNG ...
Jiaxin He, Wenting Wang, Zhaozhou Li, Jiaxin Han, Vicente Rodriguez-Gomez, Donghai Zhao, Xianguang Meng, Yipeng Jing, Shi Shao, Rui Shi, Zhenlin Tan   +10 more
doaj   +1 more source

The impact of baryons on dark matter haloes [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2009
Abstract We analyse the dark matter (DM) distribution in an ≈ 1012 M⊙ halo extracted from a simulation consistent with the concordance cosmology, where the physics regulating the transformation of gas into stars was allowed to change producing galaxies with different morphologies. Although the DM profiles get more concentrated as baryons
Pedrosa, Susana Elizabeth, Tissera, Patricia Beatriz, Scannapieco, Cecilia   +2 more
openaire   +4 more sources