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

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

机构地区：[1]Department of Astronomy,Tsinghua University,Beijing 100084,China [2]Jodrell Bank Centre for Astrophysics,Department of Physics and Astronomy,The University of Manchester,Oxford Road,Manchester M139PL,UK

出　　处：《Research in Astronomy and Astrophysics》2021年第6期403-423,共21页天文和天体物理学研究（英文版）

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)。

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.

关 键 词：galaxies:kinematics and dynamics galaxies:structure methods:numerical 

分 类 号：P152[天文地球—天文学]