| Specific Angular Momentum Distribution of Disc Galaxies Formed in Preheated Intergalactic Media |
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| 作者姓名： | LUOZhi-Jian FULi-Ping SHUCheng-Gang |
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| 作者单位： | [1]ShanghaiAstronomicalObservatory,ChineseAcademyofSciences,Shanghai200030 [2]UnitedCentreforAstrophysics,ShanghaiNormalUniversity,Shanghai200234 |
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| 摘 要： | 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 angularomomentum profiles in current disc galaxy formation models.
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| 关 键 词： | 角动量分布 预加热星系际介质 宇宙物理学 银晕 暗物质 |
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