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Anisotropic stellar systems with tangentially biased velocity dispersion

(1997) ASTRONOMY & ASTROPHYSICS. 321(3). p.703-712
Author
Organization
Abstract
This paper provides a simple general procedure to construct self-consistent spherical equilibrium models of stellar systems populated by stars in quasi-circular orbits. The focus on Maxwellian-like distributions in the relevant velocity space and the use of the epicyclic expansion allow us to work with physically intuitive models. Explicit solutions for a sequence of distribution functions with density distribution close to that of isochrone models are produced with varying degrees of pressure anisotropy. These results are meant to be the starting point for extensive stability analyses, and they may also be of interest for the construction of quantities such as projected velocity dispersion and line-of-sight-velocity profiles for comparison with observations of elliptical galaxies.
Keywords
galaxies: structure, galaxies: kinematics and dynamics, galaxies: elliptical and lenticular, cD, SPHERICAL GALAXIES, ELLIPTIC GALAXIES, DISTRIBUTIONS, STABILITY

Citation

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Chicago
Bertin, G, Francine Leeuwin, F Pegoraro, and F Rubini. 1997. “Anisotropic Stellar Systems with Tangentially Biased Velocity Dispersion.” Astronomy & Astrophysics 321 (3): 703–712.
APA
Bertin, G., Leeuwin, F., Pegoraro, F., & Rubini, F. (1997). Anisotropic stellar systems with tangentially biased velocity dispersion. ASTRONOMY & ASTROPHYSICS, 321(3), 703–712.
Vancouver
1.
Bertin G, Leeuwin F, Pegoraro F, Rubini F. Anisotropic stellar systems with tangentially biased velocity dispersion. ASTRONOMY & ASTROPHYSICS. 1997;321(3):703–12.
MLA
Bertin, G, Francine Leeuwin, F Pegoraro, et al. “Anisotropic Stellar Systems with Tangentially Biased Velocity Dispersion.” ASTRONOMY & ASTROPHYSICS 321.3 (1997): 703–712. Print.
@article{278392,
  abstract     = {This paper provides a simple general procedure to construct self-consistent spherical equilibrium models of stellar systems populated by stars in quasi-circular orbits. The focus on Maxwellian-like distributions in the relevant velocity space and the use of the epicyclic expansion allow us to work with physically intuitive models. Explicit solutions for a sequence of distribution functions with density distribution close to that of isochrone models are produced with varying degrees of pressure anisotropy. These results are meant to be the starting point for extensive stability analyses, and they may also be of interest for the construction of quantities such as projected velocity dispersion and line-of-sight-velocity profiles for comparison with observations of elliptical galaxies.},
  author       = {Bertin, G and Leeuwin, Francine and Pegoraro, F and Rubini, F},
  issn         = {0004-6361},
  journal      = {ASTRONOMY \& ASTROPHYSICS},
  keyword      = {galaxies: structure,galaxies: kinematics and dynamics,galaxies: elliptical and lenticular,cD,SPHERICAL GALAXIES,ELLIPTIC GALAXIES,DISTRIBUTIONS,STABILITY},
  language     = {eng},
  number       = {3},
  pages        = {703--712},
  title        = {Anisotropic stellar systems with tangentially biased velocity dispersion},
  volume       = {321},
  year         = {1997},
}