Gravitational wave signals and cosmological consequences of gravitational reheating

被引：34

作者：

Artymowski, Michal ^{[1
,2
]}

Czerwinska, Olga ^{[1
]}

Lalak, Zygmunt ^{[1
]}

Lewicki, Marek ^{[1
,3
]}

机构：

[1] Univ Warsaw, Fac Phys, Inst Theoret Phys, Ul Pasteura 5, PL-02093 Warsaw, Poland

[2] Jagiellonian Univ, Inst Phys, Lojasiewicza 11, PL-30348 Krakow, Poland

[3] Kings Coll London, London WC2R 2LS, England

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 04期

关键词：

inflation; gravitational waves / theory; gravity; modified gravity; INFLATION; MODELS; PERTURBATIONS;

D O I：

10.1088/1475-7516/2018/04/046

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Reheating after inflation can proceed even if the inflaton couples to Standard Model (SM) particles only gravitationally. However, particle production during the transition between de-Sitter expansion and a decelerating Universe is rather inefficient and the necessity to recover the visible Universe leads to a non-standard cosmological evolution initially dominated by remnants of the inflaton field. We remain agnostic to the specific dynamics of the inflaton field and discuss a generic scenario in which its remnants behave as a perfect fluid with a general barotropic parameter w. Using CMB and BBN constraints we derive the allowed range of inflationary scales. We also show that this scenario results in a characteristic primordial Gravitational Wave (GW) spectrum which gives hope for observation in upcoming runs of LIGO as well as in other planned experiments.

引用

页数：17

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