Galaxy Models with Tangentially Anisotropic Velocity Distributions
نویسندگان
چکیده
منابع مشابه
Galaxy Models with Tangentially Anisotropic Velocity Distributions
This paper provides two families of flexible and simple galaxy models. Representatives of many of the families possess the important cosmological cusps, with the density behaving like r−1 or r−4/3 or r−3/2 at small radii. The density falls off between r−3 and r−5 at large radii. We provide analytic and anisotropic distribution functions for all the models. Unlike many existing methods, our algo...
متن کاملFokker-Planck Models of Star Clusters with Anisotropic Velocity Distributions. I. Pre-Collapse Evolution
The evolution of a spherical single-mass star cluster is followed in detail up to core collapse by numerically solving the orbit-averaged two-dimensional FokkerPlanck equation in energy-angular momentum space. Velocity anisotropy is allowed in the two-dimensional Fokker-Planck model. Using improved numerical codes, the evolution has been followed until the central density increased by a factor ...
متن کاملFokker-Planck Models of Star Clusters with Anisotropic Velocity Distributions III. Multi-Mass Clusters
The evolution of globular clusters driven by two-body relaxation is investigated by means of numerical integration of the two-dimensional Fokker-Planck equation in energy–angular momentum space. The twodimensional Fokker-Planck equation allows the development of velocity anisotropy. We include a spectrum of stellar masses in this paper. The radial anisotropy develops, that is, the radial veloci...
متن کاملFokker-Planck Models of Star Clusters with Anisotropic Velocity Distributions II. Post-Collapse Evolution
The evolution of spherical single-mass star clusters driven by two-body relaxation was followed beyond core collapse by numerically solving the orbit-averaged Fokker-Planck equation in energy–angular momentum space. The heating effect by three-body binaries was incorporated in the Fokker-Planck models. The development of velocity anisotropy after the core collapse is discussed in detail. The an...
متن کاملMigration velocity analysis for anisotropic models
Anisotropic models are recognized as a more realistic representation of the subsurface where complex geological environment exists. These models are widely needed by all kinds of migration and interpretation schemes. However, anisotropic model building is still a challenging problem in the industry. In this paper, we propose an approach to building anisotropic models from surface seismic data b...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2006
ISSN: 0004-6256,1538-3881
DOI: 10.1086/499305