Stellar dynamical modeling-accuracy of 3D density estimation for edge-on axisymmetric galaxies

作     者：Richard J.Long Sheng-Dong Lu Dan-Dan Xu Richard J.Long;Sheng-Dong Lu;Dan-Dan Xu

作者机构：Department of AstronomyTsinghua UniversityBeijing 100084China Jodrell Bank Centre for AstrophysicsDepartment of Physics and AstronomyThe University of ManchesterOxford RoadManchester M139PLUK 

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6期

页      面：403-423页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0704[理学-天文学] 0825[工学-航空宇航科学与技术] 

基　　金：partly supported by the National Key Basic Research and Development Program of China(No.2018YFA0404501 to Shude Mao) the National Natural Science Foundation of China(NSFC,Grant Nos.11821303,11761131004 and 11761141012 to Shude Mao)。 

主　　题：galaxies:kinematics and dynamics galaxies:structure methods:numerical 

摘      要：From Rybicki’s analysis using the Fourier slice theorem,mathematically it is possible to reproduce uniquely an edge-on axisymmetric galaxy’s 3D light distribution from its 2D surface brightness.Utilizing galaxies from a cosmological simulation,we examine the ability of Syer and Tremaine’s madeto-measure method and Schwarzschild’s method for stellar dynamical modeling to do so for edge-on oblate axisymmetric galaxies.Overall,we find that the methods do not accurately recover the 3D distributions,with the made-to-measure method producing more accurate estimates than Schwarzschild’s method.Our results have implications broader than just luminosity density,and affect other luminosity-weighted distributions within galaxies,for example,age and metallicity.