首页> 外文学位 >Combined probes analysis with galaxy clustering and galaxy-galaxy lensing in the Dark Energy Survey: Methods and forecasts.
【24h】

Combined probes analysis with galaxy clustering and galaxy-galaxy lensing in the Dark Energy Survey: Methods and forecasts.

机译:《暗能量调查:方法和预测》中结合星系群集和星系-星系透镜对探针的分析。

获取原文
获取原文并翻译 | 示例

摘要

Combining galaxy-galaxy lensing and galaxy clustering, a type of the so-called combined probes analysis methods, is a promising method for inferring the growth rate of large scale structure in current and future cosmological surveys. Measuring the growth of structure in the universe will shed light on the mechanism driving the acceleration of the Universe. The Dark Energy Survey (DES) is a prime candidate for such an analysis, with its measurements of both the distribution of galaxies on the sky and the tangential shears of background galaxies induced by these foreground lenses. By constructing an end-to-end analysis that combines large-scale galaxy clustering and small-scale galaxy-galaxy lensing, we forecast the potential of a combined probes analysis on DES datasets. In particular, we develop a realistic approach to a DES combined probes analysis by jointly modeling the assumptions and systematics affecting the different components of the combined observable, employing a shared halo model, parametrized halo occupation distribution, photometric redshift uncertainties, and shear measurement errors. We also study the effect of external priors on different subsets of these parameters. We conclude that data from the first year of DES will provide powerful constraints on the evolution of structure growth in the universe, constraining the growth function to better than 8%.
机译:结合银河系和银河系聚类,一种所谓的联合探针分析方法,是在当前和未来的宇宙学调查中推断大规模结构的增长率的有前途的方法。测量宇宙中结构的增长将阐明驱动宇宙加速的机制。暗能量调查(DES)是此类分析的主要候选对象,它可以测量天空中星系的分布以及由这些前景镜头引起的背景星系的切向切变。通过构建将大规模星系群集和小规模星系-星系镜头相结合的端到端分析,我们预测了在DES数据集上进行组合探针分析的潜力。特别是,我们通过共享光环模型,参数化的光晕占用分布,光度红移不确定性和剪切测量误差,通过共同建模影响组合可观测物不同组成部分的假设和系统,为DES组合探针分析开发了一种现实的方法。我们还研究了外部先验对这些参数的不同子集的影响。我们得出的结论是,DES第一年的数据将对宇宙中结构增长的演化提供强大的约束,从而将增长函数限制在8%以上。

著录项

  • 作者

    Park, Youngsoo.;

  • 作者单位

    The University of Chicago.;

  • 授予单位 The University of Chicago.;
  • 学科 Physics.;Astrophysics.
  • 学位 Ph.D.
  • 年度 2015
  • 页码 82 p.
  • 总页数 82
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 宗教;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号