John Jardel, Karl Gebhardt
We construct axisymmetric Schwarzschild models to measure the mass profile of
the local group dwarf galaxy Fornax. These models require no assumptions to be
made about the orbital anisotropy of the stars, as is the case for commonly
used Jeans models. We test a variety of parameterizations of dark matter
density profiles and find cored models with uniform density rho_c = (1.6 +/-
0.1) x 10^-2 M_sun pc^-3 fit significantly better than the cuspy halos
predicted by cold dark matter simulations. We also construct models with an
intermediate-mass black hole, but are unable to make a detection. We place a
1-sigma upper limit on the mass of a potential intermediate-mass black hole at
M_BH < 3.2 x 10^4 M_sun.
View original:
http://arxiv.org/abs/1112.0319
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