LUO Xin-Lian1, PENG Qiu-He1,2, LONG Min1, PENG Fang1, ZOU Zhi-Gang3
1Department of Astronomy, Nanjing University, Nanjing 210093
2Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing University, Beijing 100871
3Graduate Institute of Astronomy, National Central University, Chung-Li, 32054, Taiwan, China
On Three-Dimensional Spiral Galaxies
LUO Xin-Lian1;PENG Qiu-He1,2;LONG Min1;PENG Fang1;ZOU Zhi-Gang3
1Department of Astronomy, Nanjing University, Nanjing 210093
2Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing University, Beijing 100871
3Graduate Institute of Astronomy, National Central University, Chung-Li, 32054, Taiwan, China
Abstract： Density waves in 3D spiral galaxies are studied. In order to eliminate the forbidden region near the corotation in the grand-design galaxies, we assume that the perturbation satisfies the stable condition Q(r) > 1 over all the disk except that at the corotation. Then, a new method is put forward here to determine some basic parameters of spiral galaxies. We apply it to our Galaxy, and the results are in good agreement with the previous results.
2000, Vol. 17 
