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Stellar Mass Function of Lyman Break Galaxies: Theoretical Perspective |
| LIU Xiao-Liang1;HUANG Yong-Qing1;LIU Nian-Hua1;LAI Zhen-Quan1;SHU Cheng-Gang1,2,3 |
| 1Department of Physics, School of Sciences, Nanchang University, Jiangxi 330047
2Joint Center for Astrophysics, Shanghai Normal University, Shanghai 200234
3Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030 |
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| Cite this article: |
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LIU Xiao-Liang, HUANG Yong-Qing, LIU Nian-Hua et al 2006 Chin. Phys. Lett. 23 1061-0164 |
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Abstract Adopting the observational distributions of star formation rates and half-light radii of Lyman break galaxies (LBGs) in the rest frame UV, we investigate empirically the predicted stellar mass function for LBGs. It is found that a peak exists at mass around 1.5 × 1010M⊙ for their stellar mass function and there have been significant amount of LBGs with stellar masses higher than 1011 M⊙ at z～ 3. There should be two families for LBG population observed by the Infrared Array Camera (IRAC) (which is a key instrument in the infrared space telescope Spitzer), one is red and the other is blue, which are consistent with recent works. Moreover, the predicted comoving correlation lengths for LBGs with different stellar masses, i.e., with different 8μm magnitudes, are also discussed. The red LBGs should be clustered in space more strongly than the blue LBGs. These predictions can and will be tested by the observations of IRAC, and will provide strong constraints on the current hierarchical galaxy formation model.
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98.20.Gm
98.20.-d
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Published: 01 April 2006
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| PACS: |
98.20.Gm
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(Globular clusters in the Milky Way)
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98.20.-d
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(Stellar clusters and associations)
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