Dark Matter Halos from the Inside Out
Author
Source
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-09-29
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
The balance of evidence indicates that individual galaxies and groups or clusters of galaxies are embedded in enormous distributions of cold, weakly interacting dark matter.
These dark matter “halos” provide the scaffolding for all luminous structures in the universe, and their properties comprise an essential part of the current cosmological model.
I review the internal properties of dark matter halos, focussing on the simple universal trends predicted by numerical simulations of structure formation.
Simulations indicate that halos should all have roughly the same spherically averaged density profile and kinematic structure and predict simple distributions of shape, formation history, and substructure in density and kinematics, over an enormous range of halo mass and for all common variants of the concordance cosmology.
I describe observational progress towards testing these predictions by measuring masses, shapes, profiles, and substructure in real halos using baryonic tracers or gravitational lensing.
An important property of simulated halos (possibly the most important property) is their dynamical “age”, or degree of internal relaxation.
I review recent gravitational lensing studies of galaxy clusters which will measure substructure and relaxation in a large sample of individual cluster halos, producing quantitative measures of age that are well matched to theoretical predictions.
American Psychological Association (APA)
Taylor, James E.. 2010. Dark Matter Halos from the Inside Out. Advances in Astronomy،Vol. 2011, no. 2011, pp.1-17.
https://search.emarefa.net/detail/BIM-484432
Modern Language Association (MLA)
Taylor, James E.. Dark Matter Halos from the Inside Out. Advances in Astronomy No. 2011 (2011), pp.1-17.
https://search.emarefa.net/detail/BIM-484432
American Medical Association (AMA)
Taylor, James E.. Dark Matter Halos from the Inside Out. Advances in Astronomy. 2010. Vol. 2011, no. 2011, pp.1-17.
https://search.emarefa.net/detail/BIM-484432
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-484432