Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media
LUO Zhi-Jian1,2, FU Li-Ping3, SHU Cheng-Gang1,3
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2Department of Physics, Jiangxi Normal University, Nanchang 330027
3United Centre for Astrophysics, Shanghai Normal University, Shanghai 200234
Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media
LUO Zhi-Jian1,2;FU Li-Ping3;SHU Cheng-Gang1,3
1Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030
2Department of Physics, Jiangxi Normal University, Nanchang 330027
3United Centre for Astrophysics, Shanghai Normal University, Shanghai 200234
Abstract： Assuming that baryons within a galactic halo have the same specific angular momentum as the dark matter where they locate initially and a disc forms due to the gas cooling and condensation with the conservation of angular momentum, we investigate the angular momentum distribution in a resulting galactic disc under the new preheated galaxy formation model suggested by Mo and Mao (Mon. Not. R. Astron. Soc. 333 (2002) 768). Compared with the observational results, it can be concluded that the preheated galaxy formation model can match current observations. This model can be a good approach to solve the problems of both the angular momentum catastrophe and the mismatch of angular-momentum profiles in current disc galaxy formation models.
(Origin, formation, evolution, age, and star formation)
引用本文:
LUO Zhi-Jian;FU Li-Ping;SHU Cheng-Gang;. Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media[J]. 中国物理快报, 2004, 21(7): 1409-1412.
LUO Zhi-Jian, FU Li-Ping, SHU Cheng-Gang,. Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media. Chin. Phys. Lett., 2004, 21(7): 1409-1412.
2004, Vol. 21 
