Results 71 to 80 of about 161 (110)
Grand Design, Multiple Arm, and Flocculent Spiral Galaxies
Annals of the New York Academy of Sciences, 1990 Les proprietes et les origines possibles de 3 types de structure spirale galactique sont passees en ...
Bruce G. Elmegreen
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Observational Manifestation of Chaos in Grand Design Spiral Galaxies
, 2003 To study dynamic properties of the gaseous disk of the grand design spiral galaxy NGC 3631 we calculate the Lyapunov characteristic numbers (LCN) for different families of streamlines in the disk. For the trajectories near separatrices of the giant vortices and near saddle points presenting in the velocity field, the LCN turned out to be positive.
A. M. Fridman +3 more
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Observational Manifestation of Chaos in the Gaseous Disk of the Grand Design Spiral Galaxy NGC 3631
, 2002 The main goal of the paper is to demonstrate the presence of chaotic trajectories in the gaseous disk of a real spiral galaxy. As an example we have chosen NGC 3631. First, we show the stationarity of the 3-D velocity field restored from the observed line-of-sight velocity field of the gaseous disk.
A. M. Fridman +2 more
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Non-circular motion estimation of the grand-design spiral galaxy NGC 628
AIP Conference Proceedings, 2013I present a harmonic decomposition analysis of the grand-design spiral galaxy NGC 628 using the H I data from The H I Nearby Galaxy Survey (THINGS), Walter et al., Astron. J. 136, 2563 (2008). The harmonic decomposition analysis allows the estimation of the peculiar motion magnitude of the galaxy not counted in the rotation of the disk.
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Grand Design and Flocculent Spirals in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Astrophysical Journal, 2011 D. M. Elmegreen, S G Team
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