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| Paper: |
The Intrinsic Ellipticity of Spiral Disks |
| Volume: |
275, Disks of Galaxies: Kinematics, Dynamics and Perturbations |
| Page: |
39 |
| Authors: |
Andersen, D.; Bershady, M. A. |
| Abstract: |
We have measured the distribution of intrinsic ellipticities for a sample of 28 relatively face-on spiral disks. We combine Hα velocity fields and R and I-band images to determine differences between kinematic and photometric inclination and position angles, from which we estimate intrinsic ellipticities of galaxy disks. Our findings suggest disks have a log-normal distribution of ellipticities (ε =0.06) and span a range from ε= 0 (circular) to ε=0.2. We are also able to construct a tight Tully-Fisher relation for our face-on sample. We use this to assess the contribution of disk ellipticity on the observed Tully-Fisher scatter. |
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