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arXiv 1111.1969astro-ph.CO
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超新星模拟和暗能量调查策略

Supernova Simulations and Strategies For the Dark Energy Survey

J. P. Bernstein, R. Kessler, S. Kuhlmann, R. Biswas, E. Kovacs, G. Aldering, I. Crane, C. B. D'Andrea, D. A. Finley, J. A. Frieman, T. Hufford, M. J. Jarvis, A.… 展开作者

J. P. Bernstein, R. Kessler, S. Kuhlmann, R. Biswas, E. Kovacs, G. Aldering, I. Crane, C. B. D'Andrea, D. A. Finley, J. A. Frieman, T. Hufford, M. J. Jarvis, A. G. Kim, J. Marriner, P. Mukherjee, R. C. Nichol, P. Nugent, D. Parkinson, R. R. R. Reis, M. Sako, H. Spinka, M. Sullivan

摘要:

我们提出了一个分析的超新星光变曲线模拟即将到来的暗能量调查(DES)超新星搜索。模拟采用的代码套件,生成和适应现实的光变曲线,以获得距离模量/红移对,通过宇宙学拟合。我们研究了几种不同的调查策略,包括字段选择,超新星选择偏差,测光红移测量。利用这项研究的结果,我们选择了一个30平方度的搜索区域中的格利兹过滤器集。我们预测:1)这次巡天将提供4000颗红移范围为0.05<z<1.2的Ia型超新星的均匀样本; 2)DES相机的红光效率提高将显著改善高红移颜色测量。每一颗超新星的红移都将从对宿主星系的光谱观测中获得。将获得样本子集的超新星光谱,用于对照研究。此外,我们还研究了结合光度红移的使用,同时考虑到来自宿主和超新星的数据。我们已经调查和估计可能的污染从核心坍缩超新星的光度鉴定的基础上,并已发现,Ia型超新星样品纯度高达98%是可获得的特定的假设。此外,我们提出了系统的不确定性,由于样品纯度,光度校准,灰尘消光先验,过滤器质心位移,和相互校准。最后,我们估计的宇宙学参数,将从DES超新星数据测量的不确定性。

英文摘要:

We present an analysis of supernova light curves simulated for the upcoming Dark Energy Survey (DES) supernova search. The simulations employ a code suite that generates and fits realistic light curves in order to obtain distance modulus/redshift pairs that are passed to a cosmology fitter. We investigated several different survey strategies including field selection, supernova selection biases, and photometric redshift measurements. Using the results of this study, we chose a 30 square degree search area in the griz filter set. We forecast 1) that this survey will provide a homogeneous sample of up to 4000 Type Ia supernovae in the redshift range 0.05<z<1.2, and 2) that the increased red efficiency of the DES camera will significantly improve high-redshift color measurements. The redshift of each supernova with an identified host galaxy will be obtained from spectroscopic observations of the host. A supernova spectrum will be obtained for a subset of the sample, which will be utilized for control studies. In addition, we have investigated the use of combined photometric redshifts taking into account data from both the host and supernova. We have investigated and estimated the likely contamination from core-collapse supernovae based on photometric identification, and have found that a Type Ia supernova sample purity of up to 98% is obtainable given specific assumptions. Furthermore, we present systematic uncertainties due to sample purity, photometric calibration, dust extinction priors, filter-centroid shifts, and inter-calibration. We conclude by estimating the uncertainty on the cosmological parameters that will be measured from the DES supernova data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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