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Faint field galaxies: An explanation of the faint blue excess using number evolution models
He, P; Zou, ZL; Zhang, YZ; He, P , Chinese Acad Sci, Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China.
2000
发表期刊ASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
卷号274期号:3页码:557-579
摘要Pure luminosity evolution models for galaxies provide an unacceptable fit to the redshifts and colors of faint galaxies. In this paper we demonstrate, using HST morphological number counts derived both from the I-814-band of WFPC2 in the Medium Deep Survey (MDS) and the Hubble Deep Field (HDF) and from the H-1.6-band of NICMOS, and ground-based spectroscopic data of the Hawaii Deep Field and the Canada-France Redshift Survey, that number evolution is necessary for galaxies, regardless of whether the cosmic geometry is flat, open, or Lambda -dominated. Furthermore, we show that the number evolution is small at redshifts of z < 1, but large at z > 1, and that this conclusion is valid for all the three cosmological models under consideration. If the universe is open or Lambda -dominated, the models, which are subject to the constraint of the conservation of the comoving mass density of galaxies, naturally predict a population of star-forming galaxies with the redshift distribution peaking at z = 2 similar to 3, which seems to be consistent with the recent findings from Lyman-break photometric selection techniques. If the cosmological model is flat, however, the conservation of the comoving mass density is invalid. Hence, in order to account for the steep slope of B-band number counts at faint magnitudes in the flat universe, such a star-forming galaxy population has to be introduced ad hoc into the modelling alongside the merger assumption.
部门归属Chinese Acad Sci, Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China; CAS PKU Joint Beijing Astrophys Ctr, Beijing 100871, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China
关键词France Redshift Survey Pure Luminosity Evolution K-band Survey = 1 Universe Elliptic Galaxies Lyman Limit Qso Fields Ccd Observations Counts Telescope
学科领域Physics
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收录类别SCI
WOS记录号WOS:000165811100010
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13046
专题理论物理所SCI论文
通讯作者He, P , Chinese Acad Sci, Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China.
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He, P,Zou, ZL,Zhang, YZ,et al. Faint field galaxies: An explanation of the faint blue excess using number evolution models[J]. ASTROPHYSICS AND SPACE SCIENCE,2000,274(3):557-579.
APA He, P,Zou, ZL,Zhang, YZ,&He, P , Chinese Acad Sci, Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China..(2000).Faint field galaxies: An explanation of the faint blue excess using number evolution models.ASTROPHYSICS AND SPACE SCIENCE,274(3),557-579.
MLA He, P,et al."Faint field galaxies: An explanation of the faint blue excess using number evolution models".ASTROPHYSICS AND SPACE SCIENCE 274.3(2000):557-579.
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