New Phenomena in Triaxial Stellar Systems

1983 ◽  
pp. 293-294
Author(s):  
P. Magnenat ◽  
L. Martinet
Keyword(s):  
Stellar Systems ◽  
Triaxial Stellar Systems ◽  
New Phenomena

scholarly journals New Phenomena in Triaxial Stellar Systems

1983 ◽  
Vol 100 ◽  
pp. 293-294
Author(s):  
P. Magnenat ◽  
L. Martinet
Keyword(s):  
Dynamical Systems ◽  
Degrees Of Freedom ◽  
Stellar Dynamics ◽  
Stellar Systems ◽  
Numerical Investigations ◽  
Triaxial Stellar Systems ◽  
New Phenomena ◽  
Three Degrees Of Freedom

For a number of years the Geneva Observatory stellar dynamics group has undertaken numerical investigations of stellar orbital behaviour in conservative dynamical systems with three degrees of freedom. Compared to results for 3-D axisymmetrical models (2 degrees of freedom), this work displayed the advent of several new phenomena which may appear in rotating or non-rotating stellar systems with three unequal axes (ellipticals, bulges, bars). Some of these phenomena deserve particular attention.

scholarly journals Models of cuspy triaxial stellar systems – II. Regular orbits

2012 ◽  
Vol 428 (4) ◽  
pp. 2995-3000 ◽  
Author(s):  
J. C. Muzzio ◽  
H. D. Navone ◽  
A. F. Zorzi
Keyword(s):  
Stellar Systems ◽  
Triaxial Stellar Systems

scholarly journals Kinematic signatures of triaxial stellar systems

1993 ◽  
Vol 153 ◽  
pp. 407-408
Author(s):  
Richard Arnold ◽  
Tim De Zeeuw ◽  
Chris Hunter
Keyword(s):  
Velocity Field ◽  
Dynamic Models ◽  
Elliptical Galaxies ◽  
Velocity Fields ◽  
Stellar Systems ◽  
Viewing Angle ◽  
Upper Limit ◽  
Wide Range ◽  
Triaxial Stellar Systems ◽  
Kinematic Models

Analytic dynamic models of triaxial stellar systems, such as elliptical galaxies and galactic bulges, can be used to calculate the velocity fields of systems in a wide range of potentials without the need for orbit integrations. We present results from a first application of these models, in the form of velocity fields projected onto the sky. The appearance of the velocity field depends strongly on the viewing angle. Thin orbit models provide a theoretical upper limit to streaming in all possible kinematic models in a given potential.

scholarly journals 3D gas dynamics in triaxial systems

1993 ◽  
Vol 153 ◽  
pp. 273-274
Author(s):  
D. Friedli ◽  
S. Udry
Keyword(s):  
Gas Dynamics ◽  
Elliptical Galaxies ◽  
Stellar Systems ◽  
Gas Temperature ◽  
3D Simulations ◽  
Hot Gas ◽  
Chaotic Orbits ◽  
Self Consistent ◽  
Triaxial Stellar Systems ◽  
Pattern Speed

Depending on the nature of the various components (stars, gas) present in triaxial stellar systems (elliptical galaxies, bulges and bars), the dynamics is expected to be rather different. The stars are collisionless, dissipationless, and dynamically hot; they are mainly trapped by quasi-periodic or chaotic orbits. On the contrary, the gas is collisional, dissipational, and dynamically cold; the cold or warm gas (≲ 104 K) is a powerful orbital tracer, however shocks prevent it from following self-crossing orbits. The hot gas (≲ 106 K) is influenced by “repulsive” pressure forces which prevent in close encounters the flow from being strongly shocked; it rather follows chaotic trajectories. By means of fully self-consistent 3D simulations with stars and gas using PM (Pfenniger & Friedli 1992) and SPH (Friedli & Benz 1992) techniques, we investigate the response of gaseous components in the following situations: 1) slow or fast pattern speed Ωp, 2) direct or retrograde gas motion with respect to the stars, and 3) warm or hot gas temperature T. Initial parameters and final characteristics of each runs are reported in Table I.

Kinematic signatures of triaxial stellar systems

1993 ◽  
pp. 407-408
Author(s):  
Richard Arnold ◽  
Tim de Zeeuw ◽  
Chris Hunter
Keyword(s):  
Stellar Systems ◽  
Triaxial Stellar Systems

scholarly journals Models of cuspy triaxial stellar systems – IV. Rotating systems

2016 ◽  
Vol 459 (1) ◽  
pp. 1082-1096 ◽  
Author(s):  
D. D. Carpintero ◽  
J. C. Muzzio
Keyword(s):  
Stellar Systems ◽  
Rotating Systems ◽  
Triaxial Stellar Systems

Orbital structure of self-consistent triaxial stellar systems

2007 ◽  
Vol 99 (4) ◽  
pp. 307-324 ◽  
Author(s):  
Roberto O. Aquilano ◽  
Juan C. Muzzio ◽  
Hugo D. Navone ◽  
Alejandra F. Zorzi
Keyword(s):  
Stellar Systems ◽  
Orbital Structure ◽  
Self Consistent ◽  
Triaxial Stellar Systems
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