SUPERNOVA SIMULATIONS AND STRATEGIES FOR THE DARK ENERGY SURVEY

被引:155
作者
Bernstein, J. P. [1 ]
Kessler, R. [2 ,3 ]
Kuhlmann, S. [1 ]
Biswas, R. [1 ]
Kovacs, E. [1 ]
Aldering, G. [4 ]
Crane, I. [1 ,5 ]
D'Andrea, C. B. [6 ]
Finley, D. A. [7 ]
Frieman, J. A. [2 ,3 ,7 ]
Hufford, T. [1 ]
Jarvis, M. J. [8 ,9 ]
Kim, A. G. [4 ]
Marriner, J. [7 ]
Mukherjee, P. [10 ]
Nichol, R. C. [6 ]
Nugent, P. [4 ]
Parkinson, D. [10 ]
Reis, R. R. R. [7 ]
Sako, M. [11 ]
Spinka, H. [1 ]
Sullivan, M. [12 ]
机构
[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA
[3] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA
[4] EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[5] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[6] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England
[7] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA
[8] Univ Hertfordshire, Ctr Astrophys, Sci & Technol Res Inst, Hatfield AL10 9AB, Herts, England
[9] Univ Western Cape, Dept Phys, ZA-7535 Cape Town, South Africa
[10] Univ Sussex, Dept Phys & Astron, Brighton BN1 9QH, E Sussex, England
[11] Univ Penn, Dept Astron & Astrophys, Philadelphia, PA 19104 USA
[12] Univ Oxford, Dept Phys, Oxford OX1 3RH, England
基金
英国科学技术设施理事会; 美国国家科学基金会;
关键词
cosmological parameters; dark energy; supernovae: general; GALAXY LUMINOSITY FUNCTION; DIGITAL SKY SURVEY; HIGH-REDSHIFT SUPERNOVAE; II-P SUPERNOVAE; IA SUPERNOVAE; HOST GALAXIES; LEGACY SURVEY; ACCELERATING UNIVERSE; DISTANCE MODULI; HUBBLE DIAGRAM;
D O I
10.1088/0004-637X/753/2/152
中图分类号
P1 [天文学];
学科分类号
0704 ;
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 deg(2) 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.
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页数:25
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