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CHARACTERIZING AND PROPAGATING MODELING UNCERTAINTIES IN PHOTOMETRICALLY DERIVED REDSHIFT DISTRIBUTIONS
Abrahamse, Augusta1,2; Knox, Lloyd1; Schmidt, Samuel1; Thorman, Paul1; Tyson, J. Anthony1; Zhan, Hu3
2011-06-10
Source PublicationASTROPHYSICAL JOURNAL
Volume734Issue:1
AbstractThe uncertainty in the redshift distributions of galaxies has a significant potential impact on the cosmological parameter values inferred from multi-band imaging surveys. The accuracy of the photometric redshifts measured in these surveys depends not only on the quality of the flux data, but also on a number of modeling assumptions that enter into both the training set and spectral energy distribution (SED) fitting methods of photometric redshift estimation. In this work we focus on the latter, considering two types of modeling uncertainties: uncertainties in the SED template set and uncertainties in the magnitude and type priors used in a Bayesian photometric redshift estimation method. We find that SED template selection effects dominate over magnitude prior errors. We introduce a method for parameterizing the resulting ignorance of the redshift distributions, and for propagating these uncertainties to uncertainties in cosmological parameters.
KeywordCosmological Parameters Cosmology: Observations Galaxies: Distances And Redshifts Galaxies: Photometry Gravitational Lensing: Weak
DOI10.1088/0004-637X/734/1/36
Indexed BySCI
Language英语
WOS IDWOS:000291026900036
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7901
Collection空间科学研究部
Affiliation1.Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
2.Univ Privada Boliviana, Cochabamba, Bolivia
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Abrahamse, Augusta,Knox, Lloyd,Schmidt, Samuel,et al. CHARACTERIZING AND PROPAGATING MODELING UNCERTAINTIES IN PHOTOMETRICALLY DERIVED REDSHIFT DISTRIBUTIONS[J]. ASTROPHYSICAL JOURNAL,2011,734(1).
APA Abrahamse, Augusta,Knox, Lloyd,Schmidt, Samuel,Thorman, Paul,Tyson, J. Anthony,&Zhan, Hu.(2011).CHARACTERIZING AND PROPAGATING MODELING UNCERTAINTIES IN PHOTOMETRICALLY DERIVED REDSHIFT DISTRIBUTIONS.ASTROPHYSICAL JOURNAL,734(1).
MLA Abrahamse, Augusta,et al."CHARACTERIZING AND PROPAGATING MODELING UNCERTAINTIES IN PHOTOMETRICALLY DERIVED REDSHIFT DISTRIBUTIONS".ASTROPHYSICAL JOURNAL 734.1(2011).
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