Self-similar orbit-averaged Fokker-Planck equation for isotropic spherical dense clusters(iii)Application to Galactic globular clusters

作     者：Yuta Ito Yuta Ito

作者机构：Department of PhysicsThe Graduate Center of CUNY365 Fifth AvenueNew YorkNY 10016USA Department of Physics and AstronomyThe College of Staten Island of CUNY2800 Victory BoulevardStaten IslandNY 10314USA 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第5期

页      面：43-70页

核心收录：

学科分类：07[理学] 070402[理学-天体测量与天体力学] 0704[理学-天文学] 

基　　金：European Research Council 

主　　题：(Galaxy:)globular clusters:general Galaxy:kinematics and dynamics methods:numerical 

摘      要：Fitting parametric models to globular clusters’structural profiles has been essential for the study of stellar *** provides their important structural parameters,such as the concentrations and core radii of the ***,existing parametric models can apply only to non-collapsing-core clusters in the early relaxation-evolution ***,a single parametric model cannot provide globular clusters’structural parameters in both the early and late evolution *** have recently found an accurate spectral solution for the self-similar orbit-averaged Fokker-Planck(OAFP)equation to model collapsingcore clusters at the late evolution *** present work establishes a new parametric model by combining the self-similar OAFP-and *** it is a single-mass and isotropic model,the new model applies to at least fifty-five Galactic globular clusters with resolved cores in all the evolution *** a main result,we show the characteristics of the relaxation times against the concentrations of the *** also affirm that the structures of low-concentration clusters are polytropic in the Milky Way.