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- W2072927600 abstract "An improved nonlinear asymptotic theory of spiral density waves is developed. It extends the theory developed by Yuan & Kuo to a global theory, not just one limited to the vicinity of the resonance. It can then be applied to the recent high-resolution observations of CO and HST NICMOS of nearby spiral galaxies. As an example, we apply the theory to the nearby grand-design spiral galaxy NGC 5248, which has excellent CO observations in the central regions and exhibits a continuous optical spiral pattern from about 7 kpc to about 100 pc. Using the improved nonlinear asymptotic theory, we confirm the earlier results that the inner two-arm spiral structure of NGC 5248 is driven by a slowly rotating bar potential at the outer inner Lindblad resonance and is a continuation of the outer optical spiral arms. Using the new theory, we calculate the streamlines, surface density, and line-of-sight velocity contours of the bar-driven flow in the central gas disk, and these results are in good agreement with the observations." @default.
- W2072927600 created "2016-06-24" @default.
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- W2072927600 date "2006-06-10" @default.
- W2072927600 modified "2023-10-16" @default.
- W2072927600 title "On the Spiral Structure of NGC 5248: An Analytic Approach" @default.
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- W2072927600 doi "https://doi.org/10.1086/503519" @default.
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