Abstract
We present near-infrared K-band images of 15 galaxies. We have performed a Fourier analysis on the spiral structure of these galaxies in order to determine their pitch angles and dust-penetrated arm classes. We have also obtained rotation curve data for these galaxies and calculated their shear rates. We show that there is a correlation between pitch angle and shear rate and conclude that the main determinant of pitch angle is the mass distribution within the galaxy. This correlation provides a physical basis for the dust-penetrated classification scheme of Block & Puerari (1999).
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Seigar, M.S., Block, D., Puerari, I. (2004). Dust Penetrated Arm Classes: Insight from Rising and Falling Rotation Curves. In: Block, D.L., Puerari, I., Freeman, K.C., Groess, R., Block, E.K. (eds) Penetrating Bars through Masks of Cosmic Dust. Astrophysics and Space Science Library, vol 319. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-2862-5_12
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DOI: https://doi.org/10.1007/978-1-4020-2862-5_12
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