A Bayesian analysis of inflationary primordial spectrum models using Planck data

被引：15
作者：
da Costa, Simony Santos [1 ,2 ]
Benetti, Micol [1 ]
Alcaniz, Jailson [1 ,3 ]
机构：
[1] Observ Nacl, Dept Astron, BR-20921400 Rio De Janeiro, RJ, Brazil
[2] Univ Napoli Federico II, Compl Univ Monte S Angelo, Dipartimento Fis, Edificio G,Via Cinthia, I-80126 Naples, Italy
[3] McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 03期
关键词：
cosmological parameters from CMBR; inflation; physics of the early universe; INFRARED CUTOFF; EFFICIENT; TEMPERATURE; INFERENCE; SELECTION; WMAP;
D O I：
10.1088/1475-7516/2018/03/004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The current available Cosmic Microwave Background (CMB) data show an anomalously low value of the CMB temperature fluctuations at large angular scales (l < 40). This lack of power is not explained by the minimal ACDM model, and one of the possible mechanisms explored in the literature to address this problem is the presence of features in the primordial power spectrum (PPS) motivated by the early universe physics. In this paper, we analyse a set of cutoff inflationary PPS models using a Bayesian model comparison approach in light of the latest CMB data from the Planck Collaboration. Our results show that the standard power-law parameterisation is preferred over all models considered in the analysis, which motivates the search for alternative explanations for the observed lack of power in the CMB anisotropy spectrum.
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页数：17
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