A new method to estimate local pitch angles in spiral galaxies: Application to spiral arms and feathers in M81 and M51
- Ivânio Puerari
- Bruce G. Elmegreen
- et al.
- 2014
- Astronomical Journal
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Do bars drive spiral density waves?
- Ronald J. Buta
- Johan H. Knapen
- et al.
- 2009
- Astronomical Journal