COSMOLOGY WITH PHOTOMETRICALLY CLASSIFIED TYPE Ia SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY
文献类型：期刊论文
| 作者 | Campbell, Heather1; D'Andrea, Chris B.1; Nichol, Robert C.1; Sako, Masao2; Smith, Mathew1,3; Lampeitl, Hubert1; Olmstead, Matthew D.4; Bassett, Bruce5,6,7; Biswas, Rahul8; Brown, Peter4,9 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2013-02-01 |
| 卷号 | 763期号:2 |
| 关键词 | cosmology: observations distance scale supernovae: general surveys |
| 英文摘要 | We present the cosmological analysis of 752 photometrically classified Type Ia Supernovae (SNe Ia) obtained from the full Sloan Digital Sky Survey II (SDSS-II) Supernova (SN) Survey, supplemented with host-galaxy spectroscopy from the SDSS-III Baryon Oscillation Spectroscopic Survey. Our photometric-classification method is based on the SN classification technique of Sako et al., aided by host-galaxy redshifts (0.05 < z < 0.55). SuperNova ANAlysis simulations of our methodology estimate that we have an SN Ia classification efficiency of 70.8%, with only 3.9% contamination from core-collapse (non-Ia) SNe. We demonstrate that this level of contamination has no effect on our cosmological constraints. We quantify and correct for our selection effects (e. g., Malmquist bias) using simulations. When fitting to a flat.CDM cosmological model, we find that our photometric sample alone gives Omega(m) = 0.24(-0.05)(+0.07) (statistical errors only). If we relax the constraint on flatness, then our sample provides competitive joint statistical constraints on Omega(m) and Omega(Lambda), comparable to those derived from the spectroscopically confirmed Three-year Supernova Legacy Survey (SNLS3). Using only our data, the statistics-only result favors an accelerating universe at 99.96% confidence. Assuming a constant wCDM cosmological model, and combining with H-0, cosmic microwave background, and luminous red galaxy data, we obtain w = -0.96(-0.10)(+0.10), Omega(m) = 0.29(-0.02)(+0.02), and Omega(k) = 0.00(-0.02)(+0.03)(statistical errors only), which is competitive with similar spectroscopically confirmed SNe Ia analyses. Overall this comparison is reassuring, considering the lower redshift leverage of the SDSS-II SN sample (z < 0.55) and the lack of spectroscopic confirmation used herein. These results demonstrate the potential of photometrically classified SN Ia samples in improving cosmological constraints. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000313869800019 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5866]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 2.Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA 3.Univ Western Cape, Dept Phys, ZA-7530 Cape Town, South Africa 4.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 5.Univ Cape Town, Dept Math, ZA-7925 Cape Town, South Africa 6.S African Astron Observ, ZA-7935 Cape Town, South Africa 7.African Inst Math Sci, ZA-7945 Cape Town, South Africa 8.Argonne Natl Lab, Argonne, IL 60439 USA 9.Texas A&M Univ, Dept Phys & Astron, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA 10.Wayne State Univ, Dept Phys & Astron, Detroit, MI 48126 USA |
| 推荐引用方式 GB/T 7714 | Campbell, Heather,D'Andrea, Chris B.,Nichol, Robert C.,et al. COSMOLOGY WITH PHOTOMETRICALLY CLASSIFIED TYPE Ia SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY[J]. ASTROPHYSICAL JOURNAL,2013,763(2). |
| APA | Campbell, Heather.,D'Andrea, Chris B..,Nichol, Robert C..,Sako, Masao.,Smith, Mathew.,...&Zhao, Gong-Bo.(2013).COSMOLOGY WITH PHOTOMETRICALLY CLASSIFIED TYPE Ia SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY.ASTROPHYSICAL JOURNAL,763(2). |
| MLA | Campbell, Heather,et al."COSMOLOGY WITH PHOTOMETRICALLY CLASSIFIED TYPE Ia SUPERNOVAE FROM THE SDSS-II SUPERNOVA SURVEY".ASTROPHYSICAL JOURNAL 763.2(2013). |
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来源：国家天文台
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