Probing primordial features with future galaxy surveys

被引：78

作者：

Ballardini, M. ^{[1
,2
,3
]}

Finelli, F. ^{[2
,3
]}

Fedeli, C. ^{[1
,3
,4
]}

Moscardini, L. ^{[1
,3
,4
]}

机构：

[1] Alma Mater Studiorum Univ Bologna, Dipartimento Fis & Astron, DIFA, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[2] INAF IASF Bologna, Via Gobetti 101, I-40129 Bologna, Italy

[3] INFN, Sez Bologna, Via Berti Pichat 6-2, I-40127 Bologna, Italy

[4] INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 10期

关键词：

cosmological parameters from CMBR; cosmological parameters from LSS; inflation; POWER-SPECTRUM; MICROWAVE; COSMOLOGY; PERTURBATIONS; POLARIZATION; CONSTRAINTS; DEPENDENCE; INFLATION; PRODUCTS; UNIVERSE;

D O I：

10.1088/1475-7516/2016/10/041

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the capability of future measurements of the galaxy clustering power spectrum to probe departures from a power-law spectrum for primordial fluctuations. On considering the information from the galaxy clustering power spectrum up to quasi-linear scales, i.e. k < 0.1 h Mpc(-1), we present forecasts for DESI, Euclid and SPHEREx in combination with CMB measurements. As examples of departures in the primordial power spectrum from a simple power-law, we consider four Planck 2015 best-fits motivated by inflationary models with different breaking of the slow-roll approximation. At present, these four representative models provide an improved fit to CMB temperature anisotropies, although not at statistical significant level. As for other extensions in the matter content of the simplest Lambda CDM model, the complementarity of the information in the resulting matter power spectrum expected from these galaxy surveys and in the primordial power spectrum from CMB anisotropies can be effective in constraining cosmological models. We find that the three galaxy surveys can add significant information to CMB to better constrain the extra parameters of the four models considered.

引用

页数：26

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