4.7 Article

On the complementarity of galaxy clustering with cosmic shear and flux magnification

期刊

出版社

OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt2060

关键词

gravitational lensing: weak; methods: analytical; methods: statistical; cosmology: cosmological parameters; cosmology: theory; cosmology: large-scale structure of Universe

资金

  1. STFC [ST/J004421/1]
  2. European Research Council under the EC [240185]
  3. Marie Curie IOF [252760]
  4. CITA National Fellowship
  5. DFG [Hi1495/2-1]
  6. STFC [ST/J004421/1, ST/J004421/2, ST/K001051/1] Funding Source: UKRI
  7. Science and Technology Facilities Council [ST/K001051/1, ST/J004421/2, ST/J004421/1] Funding Source: researchfish
  8. European Research Council (ERC) [240185] Funding Source: European Research Council (ERC)

向作者/读者索取更多资源

With the wealth of forthcoming data from wide-field surveys, it is more important than ever to understand the full range of independent probes of cosmology at our disposal. Here, we explore the potential for galaxy clustering and cosmic shear, separately and in combination, including the effects of lensing magnification. We show that inferred cosmological parameters may be biased when flux magnification is neglected. Results are presented for Stage III ground-based and Stage IV space-based photometric surveys, using slopes of the luminosity function inferred from the Canada-France-Hawaii Lensing Survey catalogue. We find that combining with clustering improves the shear Dark Energy Task Force-like Figure of Merit by a factor of 1.33 using only autocorrelations in redshift for the clustering analysis, rising to 1.52 when cross-correlations are also included. The further addition of galaxy-galaxy lensing gives increases in the shear Figure of Merit by a factor of 2.82 and 3.7 for each type of clustering analysis, respectively. The presence of flux magnification in a clustering analysis does not significantly affect the precision of cosmological constraints when combined with cosmic shear and galaxy-galaxy lensing. However, if magnification is neglected, inferred cosmological parameter values are biased, with biases in some cosmological parameters larger than statistical errors.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据