Studying dynamical models of the core galaxy NGC 1399 with merging remnants  

作　　者：Li-Chin Yeh Ing-Guey Jiang 

机构地区：[1]Institute of Computational and Modeling Science, National Tsing-Hua University [2]Department of Physics and Institute of Astronomy, National Tsing-Hua University

出　　处：《Research in Astronomy and Astrophysics》2018年第12期95-104,共10页天文和天体物理学研究（英文版）

基　　金：supported in part by the Ministry of Science and Technology, Taiwan, under Li-Chin Yeh’s Grant MOST 106-2115-M-007-014;Ing-Guey Jiang’s Grant MOST 106-2112-M-007-006-MY3

摘　　要：An investigation on the possible dynamical models of the core galaxy NGC 1399 is performed.Because early-type galaxies are likely to be formed through merging events, remnant rings are considered in the modeling process.A numerical survey over three parameters is employed to obtain the best-fit models that are completely consistent with observations.It is found that the inner slope of the dark matter profile is cuspy for this core galaxy.The existence of remnant rings in best-fit models indicates a merging history.The remnant ring explains the flattened surface brightness and thus could be the physical counterpart of the core structure of NGC 1399.An investigation on the possible dynamical models of the core galaxy NGC 1399 is performed.Because early-type galaxies are likely to be formed through merging events, remnant rings are considered in the modeling process.A numerical survey over three parameters is employed to obtain the best-fit models that are completely consistent with observations.It is found that the inner slope of the dark matter profile is cuspy for this core galaxy.The existence of remnant rings in best-fit models indicates a merging history.The remnant ring explains the flattened surface brightness and thus could be the physical counterpart of the core structure of NGC 1399.

关 键 词：galaxies:kinematics and dynamics galaxies:elliptical and lenticular cD galaxies:formation 

分 类 号：P[天文地球]