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| Paper: |
On the Spiral Structure of NGC 2915 |
| Volume: |
275, Disks of Galaxies: Kinematics, Dynamics and Perturbations |
| Page: |
49 |
| Authors: |
Masset, F. S.; Bureau, M. |
| Abstract: |
The galaxy NGC 2915 is a blue compact dwarf galaxy embedded in a very extended HI disk. This disk exhibits a grand-design two-armed spiral structure, as well as a central bar-like structure. We attempt to model this HI disk using column density and kinematics constraints provided by radio observations, in order to find a plausible excitation source for the spiral structure. Our models show that the spiral structure can be accounted for either by an unseen bar or a triaxial halo, and that the former leads to better fits with observations than the latter. |
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