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IDM2008 - Identification of Dark Matter 2008
IDM2008 - Identification of Dark Matter 2008
18-22 August 2008 AlbaNova
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Lensing Constraints on Dark Matter Substructure in Galaxies (25'+5')
The Cold Dark Matter paradigm predicts that galaxy dark matter halos contain 
hundreds of bound subhalos left over 
from the hierarchical galaxy formation process.  The amount of substructure is 
sensitive to the nature of dark 
matter.  Strong gravitational lensing provides the only probe of dark matter 
substructure in galaxies outside the 
Local Group.  The positions, brightnesses, and time delays of the images in 
multiply-imaged quasars are all sensitive 
to dark matter subhalos over a wide range in mass.  The theory of substructure 
lensing is rich and tractable, 
providing a firm foundation for observational studies.  Existing data reveal the 
average amount of substructure, 
which is consistent with CDM predictions.  Future large samples will allow us to 
measure the evolution of 
substructure with cosmic time, providing unique access to the distribution of 
dark matter on small scales, and key 
astrophysical evidence about the nature of dark matter.
Id: 377
Place: AlbaNova
Room: Oskar Klein auditorium
Starting date:
20-Aug-2008   11:30
Duration: 30'
Contribution type: Talk
Primary Authors: Prof. KEETON, Charles (Rutgers University)
Presenters: Prof. KEETON, Charles
Material: slide Slides
Included in session: Dark matter cosmology / structure formation
Included in track: Dark matter cosmology / structure formation

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