Global N-body simulation of galactic spiral arms
Global N-body simulation of galactic spiral arms
复制标题
银河旋臂的全局N体模拟
DOI:
10.1093/mnras/sty2274
复制
发表时间:
2018
影响因子:
4.8
通讯作者:
Eiichiro
中科院分区:
文献类型:
--
作者:
Michikoshi;Shugo; Kokubo;Eiichiro
The origin of galactic spiral arms is one of the fundamental problems in astrophysics. Based on the local analysis, Toomre proposed the swing amplification mechanism in which the self-gravity forms spiral arms as leading waves of stars rotate to trailing ones due to galactic shear. The structure of spiral arms is characterized by their number and pitch angle. We perform globalN-body simulations of spiral galaxies to investigate the dependence of the spiral structure on disc parameters and compare the simulation results with the swing amplification model. We find that the spiral structure in theN-body simulations agrees well with that predicted by the swing amplification for the wide range of parameters. The pitch angle decreases with increasing the shear rate and is independent of the disc mass fraction. The number of spiral arms decreases with both increasing the shear rate and the disc mass fraction. If the disc mass fraction is fixed, the pitch angle increases with the number of spiral arms.
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DOI:
10.3847/0004-637x/821/1/35
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
S. Michikoshi;E. Kokubo
通讯作者:
E. Kokubo
DOI:
10.3847/2041-8213/aa6256
发表时间:
2017
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
S. Michikoshi;E. Kokubo
通讯作者:
E. Kokubo
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
E. D’Onghia
通讯作者:
E. D’Onghia
影响因子:
2.3
作者:
Iwasawa, Masaki;Tanikawa, Ataru;Makino, Junichiro
通讯作者:
Makino, Junichiro
影响因子:
4.8
作者:
R. E. Hart;S. Bamford;W. Hayes;C. Cardamone;W. Keel;S. Kruk;C. Lintott;K. Masters;B. Simmons;R. Smethurst
通讯作者:
R. Smethurst