Application of the Density-Wave Theory of Spiral Structure: Shock Formation Along the Perseus Arm

1972 ◽  
Vol 173 ◽  
pp. 259 ◽  
Author(s):  
William W., Jr. Roberts
Keyword(s):  
Spiral Structure ◽  
Density Wave ◽  
Wave Theory ◽  
Shock Formation ◽  
Density Wave Theory ◽  
Perseus Arm

scholarly journals Interpretation of Observations of Spiral Structure in Terms of the Density Wave Theory

1974 ◽  
Vol 58 ◽  
pp. 399-412 ◽  
Author(s):  
Per Olof Lindblad
Keyword(s):  
Spiral Structure ◽  
Density Wave ◽  
Wave Theory ◽  
Density Waves ◽  
Density Wave Theory

A review is given of recent theoretical and observational work on the density wave theory of spiral structure. Emphasis is put on the kinematic picture, and the question whether modern observations reveal the existence of density waves is discussed.

Nonlinear density wave theory for the spiral structure of galaxies

2000 ◽  
Vol 61 (5) ◽  
pp. 5710-5716 ◽  
Author(s):  
S. Kondoh ◽  
R. Teramoto ◽  
Z. Yoshida
Keyword(s):  
Spiral Structure ◽  
Density Wave ◽  
Wave Theory ◽  
Density Wave Theory

scholarly journals Interstellar Grains and Spiral Structure

1970 ◽  
Vol 39 ◽  
pp. 306-315
Author(s):  
J. Mayo Greenberg
Keyword(s):  
Star Formation ◽  
Spiral Structure ◽  
Density Wave ◽  
Wave Theory ◽  
Dust Formation ◽  
Physical Processes ◽  
Dynamical Processes ◽  
Interstellar Grains ◽  
Broad Concept ◽  
Density Wave Theory

The problem of the interstellar grains is in many ways still unsettled. The theories of the formation, growth, and destruction of the grains have undergone a number of modifications because of the very significant increase in our understanding of the dynamical processes in our Galaxy. I will emphasize here how the density wave theory of the origin of the spiral structure may lead to a new broad concept in dust formation and its generic relationship with star formation. The basic physical processes are not changed but rather the framework in which we consider them.

scholarly journals C. Spiral Structure

1985 ◽  
Vol 19 (1) ◽  
pp. 425-427
Keyword(s):  
Spiral Structure ◽  
Density Wave ◽  
Wave Theory ◽  
Density Waves ◽  
External Perturbations ◽  
Gravitational Theories ◽  
Recent Developments ◽  
Star Formation In Galaxies ◽  
Spiral Structures ◽  
Density Wave Theory

The spiral structure of galaxies is probably related to density waves, primarily governed by gravitational forces. Density waves may result from an inherent instability of galaxies against spiral perturbations as conceived in the conventional density-wave theory or may be forced by other internal or external perturbations of the gravitational field, such as neighbouring galaxies or oval distortions and bars in the inner regions of the galaxies. Reviews of recent developments on the various aspects of gravitational theories of spiral structure have been given by Ambastha and Varma (30.151.029), Athanassoula (33.151.051, 1984), Contopoulos (32.151.021, 34.151.103), Donner (30.151.085), Hunter (34.151.053), James and Wilkinson (29.151.023), Kalnajs (33.151.024), Kormendy (32.151.049), Lin (32.151.040, 33.151.025, 33.151.071), Lin and Bertin (30.151.068, 1984), Lin and Roberts (30.151.045), Martinet (30.151.043), McElroy (34.157.160), Norman (33. 157.088), Pasha and Tsitsin (34.151.042), Sorensen (29.151.024), Thonnard (31.158. 357), and Toomre (30.151.021). Seiden and Gerola (31.151.084) reviewed the theory of formation of spiral structures by stochastic self-propagating star formation in galaxies.

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