TYPE Ia SUPERNOVA DISTANCE MODULUS BIAS AND DISPERSION FROM K-CORRECTION ERRORS: A DIRECT MEASUREMENT USING LIGHT CURVE FITS TO OBSERVED SPECTRAL TIME SERIES
文献类型：期刊论文
| 作者 | Saunders, C.1,2; Aldering, G.1; Antilogus, P.3; Aragon, C.1; Bailey, S.1; Baltay, C.4; Bongard, S.3; Buton, C.5; Canto, A.3; Cellier-Holzem, F.3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015-02-10 |
| 卷号 | 800期号:1 |
| 关键词 | cosmology: observations supernovae: general |
| 英文摘要 | We estimate systematic errors due to K-corrections in standard photometric analyses of high-redshift Type Ia supernovae. Errors due to K-correction occur when the spectral template model underlying the light curve fitter poorly represents the actual supernova spectral energy distribution, meaning that the distance modulus cannot be recovered accurately. In order to quantify this effect, synthetic photometry is performed on artificially redshifted spectrophotometric data from 119 low-redshift supernovae from the Nearby Supernova Factory, and the resulting light curves are fit with a conventional light curve fitter. We measure the variation in the standardized magnitude that would be fit for a given supernova if located at a range of redshifts and observed with various filter sets corresponding to current and future supernova surveys. We find significant variation in the measurements of the same supernovae placed at different redshifts regardless of filters used, which causes dispersion greater than similar to 0.05 mag for measurements of photometry using the Sloan-like filters and a bias that corresponds to a 0.03 shift in w when applied to an outside data set. To test the result of a shift in supernova population or environment at higher redshifts, we repeat our calculations with the addition of a reweighting of the supernovae as a function of redshift and find that this strongly affects the results and would have repercussions for cosmology. We discuss possible methods to reduce the contribution of the K-correction bias and uncertainty. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000349236900057 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6655]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA 2.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA 3.Univ Paris 07, Univ Paris 06, CNRS, Lab Phys Nucl & Hautes Energies,IN2P3, F-75252 Paris 05, France 4.Yale Univ, Dept Phys, New Haven, CT 06250 USA 5.Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France 6.Univ Bonn, Inst Phys, D-53115 Bonn, Germany 7.Lawrence Berkeley Natl Lab, Computat Res Div, Computat Cosmol Ctr, Berkeley, CA 94720 USA 8.Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA 9.Univ Lyon 1, Ctr Rech Astron Lyon, F-69561 St Genis Laval, France 10.Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia |
| 推荐引用方式 GB/T 7714 | Saunders, C.,Aldering, G.,Antilogus, P.,et al. TYPE Ia SUPERNOVA DISTANCE MODULUS BIAS AND DISPERSION FROM K-CORRECTION ERRORS: A DIRECT MEASUREMENT USING LIGHT CURVE FITS TO OBSERVED SPECTRAL TIME SERIES[J]. ASTROPHYSICAL JOURNAL,2015,800(1). |
| APA | Saunders, C..,Aldering, G..,Antilogus, P..,Aragon, C..,Bailey, S..,...&Nearby Supernova Factory.(2015).TYPE Ia SUPERNOVA DISTANCE MODULUS BIAS AND DISPERSION FROM K-CORRECTION ERRORS: A DIRECT MEASUREMENT USING LIGHT CURVE FITS TO OBSERVED SPECTRAL TIME SERIES.ASTROPHYSICAL JOURNAL,800(1). |
| MLA | Saunders, C.,et al."TYPE Ia SUPERNOVA DISTANCE MODULUS BIAS AND DISPERSION FROM K-CORRECTION ERRORS: A DIRECT MEASUREMENT USING LIGHT CURVE FITS TO OBSERVED SPECTRAL TIME SERIES".ASTROPHYSICAL JOURNAL 800.1(2015). |
入库方式： OAI收割
来源：国家天文台
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