Simultaneous constraints on bias, normalization and growth index through power spectrum measurements

被引：8
作者：
Di Porto, Cinzia [1 ,2 ,3 ]
Amendola, Luca [3 ]
Branchini, Enzo [4 ,5 ,6 ]
机构：
[1] INAF Osservatorio Astron Bologna, I-40127 Bologna, Italy
[2] Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy
[3] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany
[4] Univ Roma Tre, Dipartimento Fis E Amaldi, I-00146 Rome, Italy
[5] Ist Nazl Fis Nucl, Sez Roma, Milan, Italy
[6] Osserv Astron Brera, INAF, Milan, Italy
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2012年 / 423卷 / 01期
关键词：
cosmological parameters; dark energy; large-scale structure of Universe; GALAXY REDSHIFT SURVEY; PROBING DARK ENERGY; ACOUSTIC-OSCILLATIONS; SPACE; MODELS;
D O I：
10.1111/j.1745-3933.2012.01265.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this Letter, we point out that redshift surveys can break the degeneracy between the galaxy bias, the power spectrum normalization, s8, 0, and the growth factor, without the need for external information by using a simple and rather general parametrization for the growth rate, the well-known ? parametrization and measuring the power spectrum at least at two different redshifts. We find that in next-generation surveys like Euclid, s8, 0 and ? can be measured to within 1 and 5 per cent, respectively, while the bias b(z) can be measured to within 12 per cent in each of 14 equal-width redshift bins spanning 0.7 =z= 2.
引用
收藏
页码：L97 / L101
页数：5
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