COSMOLOGY WITH PHOTOMETRIC SURVEYS OF TYPE Ia SUPERNOVAE
文献类型：期刊论文
| 作者 | Gong, Yan1,2,3 ; Cooray, Asantha1; Chen, Xuelei2,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2010-02-01 |
| 卷号 | 709期号:2页码:1420-1428 |
| 关键词 | cosmology: theory distance scale large-scale structure of universe supernovae: general |
| 英文摘要 | We discuss the extent to which photometric measurements alone can be used to identify Type Ia supernovae (SNIa) and to determine the redshift and other parameters of interest for cosmological studies. We fit the light curve data of the type expected from a survey such as the one planned with the Large Synoptic Survey Telescope (LSST) and also remove the contamination from the core-collapse SNe to SNIa samples. We generate 1000 SNIa mock flux data for each of the LSST filters based on existing design parameters, then use a Markov Chain Monte Carlo analysis to fit the redshift, apparent magnitude, stretch factor, and the phase of the SNIa. We find that the model fitting works adequately well when the true SNe redshift is below 0.5, while at z < 0.2 the accuracy of the photometric data is almost comparable with spectroscopic measurements of the same sample. We discuss the contamination of Type Ib/c (SNIb/c) and Type II supernova (SNII) on the SNIa data set. We find that it is easy to distinguish the SNII through the large chi(2) mismatch when fitting to photometric data with Ia light curves. This is not the case for SNIb/c. We implement a statistical method based on the Bayesian estimation in order to statistically reduce the contamination from SNIb/c for cosmological parameter measurements from the whole SNe sample. The proposed statistical method also evaluates the fraction of the SNIa in the total SNe data set, which provides a valuable guide to establish the degree of contamination. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000273579800070 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7816]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 4.Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gong, Yan,Cooray, Asantha,Chen, Xuelei. COSMOLOGY WITH PHOTOMETRIC SURVEYS OF TYPE Ia SUPERNOVAE[J]. ASTROPHYSICAL JOURNAL,2010,709(2):1420-1428. |
| APA | Gong, Yan,Cooray, Asantha,&Chen, Xuelei.(2010).COSMOLOGY WITH PHOTOMETRIC SURVEYS OF TYPE Ia SUPERNOVAE.ASTROPHYSICAL JOURNAL,709(2),1420-1428. |
| MLA | Gong, Yan,et al."COSMOLOGY WITH PHOTOMETRIC SURVEYS OF TYPE Ia SUPERNOVAE".ASTROPHYSICAL JOURNAL 709.2(2010):1420-1428. |
入库方式： OAI收割
来源：国家天文台
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