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| Paper: |
Dark Matter in Dwarf Galaxies: Latest Density Profile Results |
| Volume: |
327, Satellites and Tidal Streams |
| Page: |
18 |
| Authors: |
Simon, J.D.; Bolatto, A.D.; Leroy, A.; Blitz, L. |
| Abstract: |
We present high-resolution two-dimensional velocity fields in Hα and CO of the nearby dwarf galaxy NGC 2976. Our observations were made at both higher spatial resolution (∼75 pc) and higher velocity resolution (13 km s−1 in Hα and 2 km s−1 in CO) than most previous studies. We show that NGC 2976 has a very shallow dark matter density profile, with ρ(r) lying between ρ ∞ r−0:3 and ρ ∞ r0. We carefully test the effects of systematic uncertainties on our results, and demonstrate that well-resolved, two-dimensional velocity data can eliminate many of the systematic problems that beset long-slit observations. We also present a preliminary analysis of the velocity field of NGC 5963, which appears to have a nearly NFW density profile. |
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