scholarly journals TWISTED COSMIC WEB AS THE ORIGIN OF SPIRAL STRUCTURE IN DISK GALAXIES

2021 ◽  
Vol 3 (337) ◽  
pp. 167-178
Author(s):  
D. Yurin ◽  
M. Kalambay ◽  
A. Ibraimova ◽  
H. Mahmet ◽  
M. Makukov
Keyword(s):  
Spiral Structure ◽  
Disk Galaxies

Density waves in disk galaxies

1967 ◽  
Vol 31 ◽  
pp. 313-317 ◽  
Author(s):  
C. C. Lin ◽  
F. H. Shu
Keyword(s):  
Mathematical Analysis ◽  
Spiral Structure ◽  
Stellar System ◽  
Collective Modes ◽  
Disk Galaxies ◽  
Spiral Pattern ◽  
Density Waves ◽  
The Galaxy ◽  
Detailed Mathematical Analysis

Density waves in the nature of those proposed by B. Lindblad are described by detailed mathematical analysis of collective modes in a disk-like stellar system. The treatment is centered around a hypothesis of quasi-stationary spiral structure. We examine (a) the mechanism for the maintenance of this spiral pattern, and (b) its consequences on the observable features of the galaxy.

Dynamical imprint of interstellar gas on persistence of spiral structure in galaxies

2017 ◽  
Vol 13 (S334) ◽  
pp. 296-297
Author(s):  
Soumavo Ghosh ◽  
Chanda J. Jog
Keyword(s):  
Time Scale ◽  
Spiral Structure ◽  
Density Wave ◽  
Disk Galaxies ◽  
Interstellar Gas ◽  
Spiral Arms ◽  
Pattern Speed

AbstractThe persistence of the spiral structure in disk galaxies has long been debated. In this work, we investigate the dynamical influence of interstellar gas on the persistence of the spiral arms in disk galaxies. We show that the gas helps the spiral arms to survive for longer time-scale (~ a few Gyr). Also, we show that the addition of gas in calculation is necessary for getting a stable density wave corresponding to the observed pattern speed of the spiral arms.

scholarly journals Shells, Ripples and Tails

1999 ◽  
Vol 186 ◽  
pp. 165-172
Author(s):  
D. Carter
Keyword(s):  
Spiral Structure ◽  
Morphological Features ◽  
Disk Galaxies ◽  
Tidal Tails

It has been known since the early simulations of Wright (1972), and Toomre & Toomre (1972), that interactions between galaxies can give rise to quite spectacular morphological features, including spiral structure in disk galaxies, and extensive tails. It appears that long tidal tails only arise from interactions involving disk galaxies (Toomre & Toomre 1972), and thus the presence of two opposed long tidal tails in a number of disturbed galaxies such as the Antennae (Whitmore & Schweizer 1995), NGC 3921 (Schweizer 1996), and NGC 7252 (Schweizer 1982), has led to the interpretation of these galaxies as disk-disk mergers in progress. These systems can be modeled rather successfully, as the work of Hibbard & Mihos (1995) has shown.

scholarly journals A FUNDAMENTAL PLANE OF SPIRAL STRUCTURE IN DISK GALAXIES

2015 ◽  
Vol 802 (1) ◽  
pp. L13 ◽  
Author(s):  
Benjamin L. Davis ◽  
Daniel Kennefick ◽  
Julia Kennefick ◽  
Kyle B. Westfall ◽  
Douglas W. Shields ◽  
...  
Keyword(s):  
Spiral Structure ◽  
Disk Galaxies ◽  
Fundamental Plane

scholarly journals Outer spiral structure in disk galaxies

2016 ◽  
Vol 11 (S321) ◽  
pp. 123-123
Author(s):  
P.A. Patsis
Keyword(s):  
Periodic Orbits ◽  
Spiral Galaxies ◽  
Spiral Structure ◽  
Disk Galaxies ◽  
Spiral Arms ◽  
Chaotic Orbits ◽  
Grand Design ◽  
Pattern Speed ◽  
Spiral Structures ◽  
Barred Spiral Galaxies

AbstractIn several grand design barred-spiral galaxies it is observed a second, fainter, outer set of spiral arms. Typical examples of objects of this morphology can be considered NGC 1566 and NGC 5248. I suggest that such an overall structure can be the result of two dynamical mechanisms acting in the disc. The bar and both spiral systems rotate with the same pattern speed. The inner spiral is reinforced by regular orbits trapped around the stable, elliptical, periodic orbits of the central family, while the outer system of spiral arms is supported by chaotic orbits. Chaotic orbits are also responsible for a rhomboidal area surrounding the inner barred-spiral region. In general there is a discontinuity between the two spiral structures at the corotation region.

On the Spiral Structure of Disk Galaxies.

1964 ◽  
Vol 140 ◽  
pp. 646 ◽  
Author(s):  
C. C. Lin ◽  
Frank H. Shu
Keyword(s):  
Spiral Structure ◽  
Disk Galaxies

scholarly journals Investigating the Origins of Spiral Structure in Disk Galaxies through a Multiwavelength Study

2019 ◽  
Vol 874 (2) ◽  
pp. 177 ◽  
Author(s):  
Ryan Miller ◽  
Daniel Kennefick ◽  
Julia Kennefick ◽  
Mohamed Shameer Abdeen ◽  
Erik Monson ◽  
...  
Keyword(s):  
Spiral Structure ◽  
Disk Galaxies

scholarly journals Evolution of Galaxies Governed by Disk Dynamics and Spiral Structure

1977 ◽  
Vol 45 ◽  
pp. 31-45
Author(s):  
Raymond J. Talbot
Keyword(s):  
Star Formation ◽  
Spiral Structure ◽  
Disk Galaxies ◽  
Major Topic ◽  
The Past ◽  
Evolution Of Galaxies ◽  
Evolutionary Changes

My major topic will be the evolutionary changes in disk galaxies caused by the continuing process of star formation. The task of interpreting observations to derive the past rate of star formation is treacherous, as I am sure will be evident in the various observational papers presented at this colloquium. Therefore, I will mention only briefly some of the basic aspects of models which have been used to discuss that past evolution.

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