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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, R. Z. Sagdeev, Oleg V. Khoruzii, E. V. Polyachenko   +3 more
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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
openalex   +3 more sources

PANORAMIC: Discovery of an ultra-massive grand-design spiral galaxy at z∼5.2 [PDF]

Astronomy & Astrophysics
We report the discovery of an ultra-massive grand-design red spiral galaxy, named Zhúlóng (Torch Dragon), at zphot = 5.2−0.2+0.3 in the JWST PANORAMIC survey; it is the most distant bulge+disk galaxy candidate with spiral arms known to date. Zhúlóng displays an extraordinary combination of properties: (1) a classical bulge centered in a large, face-on ...
Mengyuan Xiao, Christina C. Williams, Pascal A. Oesch, D. Elbaz, M. Dessauges‐Zavadsky, R. Marques-Chaves, L. Bing, Zhiyuan Ji, Andrea Weibel, Rachel Bezanson, Gabriel Brammer, Caitlin M. Casey, Aidan P. Cloonan, E. Daddi, Pratika Dayal, Andreas L. Faisst, Marijn Franx, Karl Glazebrook, Anne Hutter, Jeyhan S. Kartaltepe, Ivo Labbé, G. Lagache, Seunghwan Lim, B. Magnelli, Felix Martinez, Michael V. Maseda, Themiya Nanayakkara, D. Schaerer, Katherine E. Whitaker   +28 more
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Observational Manifestation of Chaos in the Gaseous Disk of the Grand Design Spiral Galaxy NGC 3631

Space Science Reviews, 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, O. V. Khoruzhii, E. V. Polyachenko   +2 more
openalex   +3 more sources

Blue and near-infrared surface photometry of spiral structure in 34 nonbarred grand design and flocculent galaxies

The Astrophysical Journal Supplement Series, 1984
On a examine les profils radiaux du disque et la structure des bras spiraux des 34 galaxies. On donne les profils azimutaux et les diagrammes couleur-amplitude des bras spiraux. On discute des modeles d'evolution de la couleur. Ces modeles sont utilises pour determiner l'amplitude des spirales de densite stellaire sous jacentes et le renforcement ...
D. M. Elmegreen, Bruce G. Elmegreen
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Non-circular motion estimation of the grand-design spiral galaxy NGC 628

AIP Conference Proceedings, 2013
I 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.
openaire   +2 more sources

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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