Type Ia supernovae selection and forecast of cosmology constraints for the Dark Energy Survey

被引：4

作者：

Gjergo, Eda ^{[1
,2
]}

Duggan, Jefferson ^{[3
]}

Cunningham, John D. ^{[1
,3
]}

Kuhlmann, Steve ^{[1
]}

Biswas, Rahul ^{[1
]}

Kovacs, Eve ^{[1
]}

Bernstein, Joseph P. ^{[1
]}

Spinka, Harold ^{[1
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] IIT, Appl Math Off, Chicago, IL 60616 USA

[3] Loyola Univ Chicago, Dept Phys, Chicago, IL 60660 USA

来源：

ASTROPARTICLE PHYSICS | 2013年 / 42卷

关键词：

Supernova; Cosmology;

D O I：

10.1016/j.astropartphys.2012.11.009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of a study of selection criteria to identify Type la supernovae photometrically in a simulated mixed sample of Type la supernovae and core collapse supernovae. The simulated sample is a mockup of the expected results of the Dark Energy Survey. Fits to the MLOS2k2 and SALT2 Type la supernova models are compared and used to help separate the Type la supernovae from the core collapse sample. The Dark Energy Task Force Figure of Merit (modified to include core collapse supernovae systematics) is used to discriminate among the various selection criteria. This study of varying selection cuts for Type la supernova candidates is the first to evaluate core collapse contamination using the Figure of Merit. Different factors that contribute to the Figure of Merit are detailed. With our analysis methods, both SALT2 and mLcs2k2 Figures of Merit improve with tighter selection cuts and higher purities, peaking at 98% purity. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：52 / 61

页数：10

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