Observational constraints on monomial warm inflation

被引：40
作者：
Visinelli, Luca [1 ,2 ]
机构：
[1] KTH Royal Inst Technol, NORDITA, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden
[2] Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 07期
关键词：
inflation; particle physics - cosmology connection; PROBE WMAP OBSERVATIONS; POWER-LAW INFLATION; DENSITY PERTURBATIONS; COSMOLOGICAL MODELS; UNIVERSE SCENARIO; PHASE-TRANSITION; DYNAMICS; FIELD; FLUCTUATIONS; FLATNESS;
D O I：
10.1088/1475-7516/2016/07/054
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Warm inflation is, as of today, one of the best motivated mechanisms for explaining an early inflationary period. In this paper, we derive and analyze the current bounds on warm inflation with a monomial potential U alpha phi(P), using the constraints from the PLANCK mission. In particular, we discuss the parameter space of the tensor-to-scalar ratio r and the potential. coupling A of the monomial warm inflation in terms of the number of e-folds. We obtain that the theoretical tensor-to-scalar ratio r similar to 10(-8) is much smaller than the current observational constrain r less than or similar to,0.12, despite a relatively large value of the field excursion Delta phi similar to 0.1 M-PI. Warm inflation thus eludes the Lyth bound set on the tensor-to-scalar ratio by the field excursion.
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页数：22
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