Dark Matter halos at galaxy scale

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Dark Matter halos at galaxy scale Antti Tamm,
Elmo Tempel, Peeter Tenjes Joint Seminar on
Cosmology and Astroparticle Physics February 26th
27th , Tartu Observatory
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SPIRAL GALAXY
Rotating disk with spiral pattern gravity is
counterbalanced by rotation Spherical bulge
gravity is counter balanced by velocity
dispersions Luminosity L, mass M, M / L
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DISK KINEMATICS
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DISK KINEMATICS
V r
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DISK KINEMATICS
mV2/r GMrm/r2
V2 1/r1/2
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DISK KINEMATICS
V const
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DISK KINEMATICS
Sufue Rubin 2001
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Decomposing luminosity distribution of Andromeda
Galaxy (Tenjes et al. 1994)
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Decomposing the rotation curve of Andromeda
Galaxy (Tenjes et al. 1994)
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Non-baryonic DARK MATTER
HOT ultrarelativistic WARM relativistic COLD
non-relativistic (supersymmetric particles)
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Simulations
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CDM simulations Navarro, Frenk White (NFW)
profile
Cuspy DM halos from simulations density rising
infinitely towards center
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Cuspy DM halos from simulations density rising
infinitely towards center
Dark Matter crisis observations vs.
simulations
Explanations insufficient resolution of
simulations poor observations warming up of DM
isothermal from observations
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Andromeda rotation curve
Meie m31
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Andromeda velocity dispersions
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No crisis for Andromeda
NFW, simulations , kõigis mastaapides,
elliptiline