1Department of Astronomy, Nanjing University, Nanjing 210093
2Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing University, Beijing 100871
Disk Stability of the Milky Way Near the Sun
LUO Xin-lian1;PENG Qiu-he1,2
1Department of Astronomy, Nanjing University, Nanjing 210093
2Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center, Beijing University, Beijing 100871
Abstract： By solving Poisson's equation for logarithmic density disturbance in three-dimensional (3D) spiral galaxies, the disturbed potential can be given on the disk. Combining it with the corresponding dispersion relation, the local gravitational stability of our galaxy is discussed here. We have generalized the Toomre's stability criterion to the more realistic 3D galaxy models. The generalized Toomre's parameter Q near the sun is 2.08 or 2.20 for two or four armed spiral galaxy models, respectively.
LUO Xin-lian;PENG Qiu-he;. Disk Stability of the Milky Way Near the Sun[J]. 中国物理快报, 1999, 16(12): 931-933.
LUO Xin-lian, PENG Qiu-he,. Disk Stability of the Milky Way Near the Sun. Chin. Phys. Lett., 1999, 16(12): 931-933.
1999, Vol. 16 
