期刊
ASTROPHYSICAL JOURNAL
卷 746, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0004-637X/746/1/89
关键词
dark matter; galaxies : dwarf; galaxies : individual (Fornax); galaxies : kinematics and dynamics; Local Group
资金
- [NSF-0908639]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0908639] Funding Source: National Science Foundation
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-circle dot 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. <= 3.2 x 10(4) M-circle dot.
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