Tomography of collisionless stellar systems
@article{Ciotti1994TomographyOC, title={Tomography of collisionless stellar systems}, author={Luca Ciotti}, journal={Celestial Mechanics and Dynamical Astronomy}, year={1994}, volume={60}, pages={401-407} }
In this paper the concept of tomography of a collisionless stellar system of general shape is introduced, and a generalization of the Projected Virial Theorem is obtained. Applying the tomographic procedure we then derive a new family of virial equations which coincides with the already known ones for spherically symmetric systems. This result is obtained without any use of explicit expressions for the line-of-sight velocity dispersion, or spherical coordinate system.
6 Citations
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References
SHOWING 1-4 OF 4 REFERENCES
Fourth moments and the dynamics of spherical systems
- Geology, Physics
- 1990
An investigation of the fourth moment of velocity data from the globular cluster Omega Cen demonstrates that useful constraints can be obtained from a dataset of only 300 velocities. The fourth…
Self-consistent two-component models of elliptical galaxies
- Physics
- 1992
Spherical self-consistent elliptical galaxy models, embedded in a dark matter halo, are constructed. Two different stellar distributions are considered : the King law, and another one reproducing the…
Testing for triaxiality with kinematic data
- Physics
- 1985
Des modeles cinematiques simples de galaxies elliptiques sont utilises pour montrer que si les galaxies sont triaxiales, les vitesses de rotation suivant leurs axes principaux apparents doivent etre…