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Origin and Properties of Strong MgII Quasar Absorption Line Systems
Lin Weipeng; Zou Zhenlong
2001
Source PublicationChinese Journal of Astronomy and Astrophysics
ISSN1009-9271
Volume1Issue:1Pages:21
AbstractStrong Mg II quasar absorption line systems provide us with a useful tool to understand the gas that plays an important role in galaxy formation. In this paper, placing the theories of galaxy formation in a cosmological context, we present semi-analytic models and Monte-Carlo simulations for strong Mg II absorbers produced in gaseous galactic haloes and/or galaxy discs. We investigate the redshift path density for the Mg II absorption lines and the properties of galaxy/absorber pairs, in particular the anti-correlation between the equivalent width of Mg II absorption line and the projected galaxy-to-sightline distance. The simulated result of the mean redshift path density of strong Mg II systems is consistent with the observational result. The fraction of strong Mg II systems arising from galaxy disks is predicted to be similar to 10% of the total. There exists an anti-correlation between the absorption line equivalent and the projected distance of sightline to galaxy center and galaxy luminosity. We determined that the mean absorbing radius R(abs) approximate to 29 h(-1) kpc(L(B)/L(B*))(0.35). After taking selection effects into consideration, this becomes R(abs) approximate to 38 h(-1) kpc(L(B)/L(B*))(0.18), which is in good agreement with the observational result. This shows the importance of considering selection effects when comparing models with observations.
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/52074
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lin Weipeng,Zou Zhenlong. Origin and Properties of Strong MgII Quasar Absorption Line Systems[J]. Chinese Journal of Astronomy and Astrophysics,2001,1(1):21.
APA Lin Weipeng,&Zou Zhenlong.(2001).Origin and Properties of Strong MgII Quasar Absorption Line Systems.Chinese Journal of Astronomy and Astrophysics,1(1),21.
MLA Lin Weipeng,et al."Origin and Properties of Strong MgII Quasar Absorption Line Systems".Chinese Journal of Astronomy and Astrophysics 1.1(2001):21.
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