Download presentation
Presentation is loading. Please wait.
Published byDanna Iden Modified over 9 years ago
1
Dwarf spheroidal galaxies as targets for indirect dark matter searches Ewa L. Łokas (Copernicus Center, Warsaw)
2
Indirect dark matter searches Gamma rays predicted as annihilation products of SUSY dark matter Imaging Atmospheric Cherenkov Telescope (IACT) arrays: HESS, VERITAS, MAGIC, CACTUS Satellites: GLAST (planned for 2007)
3
Targets for dark matter searches Milky Way (galactic centre, substructure) Very near so flux should be high, but crowded Andromeda galaxy clusters dwarf spheroidal galaxies
4
Dwarf spheroidal galaxies They are believed to be strongly dark matter dominated with M/L > 100 M /L Few of them are within 100 kpc Their masses and mass distributions are important for the solution of the overabundance problem and the cusp/core problem They are perfect targets for indirect dark matter searches
5
Draco dwarf Well–studied dwarf at 80 kpc with high M/L > 100 M /L Local Group
6
Stellar kinematics in Draco Velocity moments:Dark matter distribution estimated by modelling velocity distribution from kinematic data for 207 stars
7
Dark matter distribution in Draco Dark matter distribution model based on N–body simulations of tidal stripping of dwarfs in the Milky Way potential: α=1 (cusp) α=0 (core) M tot : 5.5 10 8 M 1.2 10 8 M
8
CACTUS γ–ray excess from Draco Profumo & Kamionkowski (2006)
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.