Gravitational lensing constraints on dynamical and coupled dark energy

被引：17
作者：
La Vacca, G. [1 ,2 ]
Colombo, L. P. L. [2 ,3 ,4 ]
机构：
[1] Univ Pavia, Dipartimento Fis Teor & Nucl, I-27100 Pavia, Italy
[2] Ist Nazl Fis Nucl, Sez Milano Bicocca, Rome, Italy
[3] Univ Milano Bicocca, Dipartimento Fis G Occhialini, I-20126 Milan, Italy
[4] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2008年 / 04期
关键词：
dark energy theory; gravitational lensing;
D O I：
10.1088/1475-7516/2008/04/007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Upcoming weak lensing (WL) surveys can be used to constrain dark energy (DE) properties, namely if tomographic techniques are used to improve their sensitivity. In this work, we use a Fisher matrix technique to compare the power of CMB anisotropy and polarization data with tomographic WL data, in constraining DE parameters. Adding WL data to available CMB data improves the detection of all cosmological parameters, but the impact is really strong when DE - DM coupling is considered, as WL tomography can then succeed to reduce the errors on some parameters by factors > 10.
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页数：22
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