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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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Impacts of WIMP dark matter upon stellar evolution: main-sequence stars (15'+5')
 
The presence of large amounts of WIMP dark matter in stellar cores has been 
shown to
have significant effects upon models of stellar evolution.  We present a series of
detailed grids of WIMP-influenced stellar models for main sequence stars, 
computed
using DarkStars.  We describe the changes in stellar structure and main 
sequence
evolution which occur for masses ranging from 0.3 to 2.0 solar masses and
metallicities from Z = 0.0003 to 0.02, as a function of the rate of energy 
injection
by WIMPs.  We then go on to show what rates of energy injection can be 
obtained using
realistic orbital parameters for stars near supermassive black holes, including
detailed considerations of dark matter halo velocity and density profiles.  
Capture
and annihilation rates are strongly boosted when stars follow elliptical rather 
than
circular orbits, leading to punctuated evolution.
 
Id: 382
Place: AlbaNova
Room: FB53
Starting date:
21-Aug-2008   13:00
Duration: 20'
Contribution type: Talk
Primary Authors: SCOTT, Pat (Dept. Physics, Stockholm University)
Co-Authors: FAIRBAIRN, Malcolm (CERN & King's College London)
EDSJö, Joakim (Dept. Physics, Stockholm University)
Presenters: SCOTT, Pat
Material: slide Slides
 
Included in session: Dark Stars
Included in track: Dark Stars
 

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