Revisiting CMB constraints on warm inflation

被引：34

作者：

Arya, Richa ^{[1
,4
]}

Dasgupta, Arnab ^{[1
]}

Goswami, Gaurav ^{[2
]}

Prasad, Jayanti ^{[3
]}

Rangarajan, Raghavan ^{[1
]}

机构：

[1] Phys Res Lab, Theoret Phys Div, Ahmadabad 380009, Gujarat, India

[2] Ahmedabad Univ, Sch Engn & Appl Sci, Ahmadabad 380009, Gujarat, India

[3] Interuniv Ctr Astron & Astrophys, Pune 411007, Maharashtra, India

[4] Indian Inst Technol Gandhinagar, Palaj 382355, Gandhinagar, India

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2018年 / 02期

关键词：

cosmological parameters from CMBR; inflation; UNIVERSE SCENARIO; DYNAMICS; FLATNESS; SPECTRA; HORIZON; MODEL;

D O I：

10.1088/1475-7516/2018/02/043

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit the constraints that Planck 2015 temperature, polarization and lensing data impose on the parameters of warm inflation. To this end, we study warm inflation driven by a single scalar field with a quartic self interaction potential in the weak dissipative regime. We analyse the effect of the parameters of warm inflation, namely, the inflaton self coupling lambda and the inflaton dissipation parameter Q(P) on the CMB angular power spectrum. We constrain lambda and Q(P) for 50 and 60 number of e-foldings with the full Planck 2015 data (TT, TE, EE + lowP and lensing) by performing a Markov-Chain Monte Carlo analysis using the publicly available code CosmoMC and obtain the joint as well as marginalized distributions of those parameters. We present our results in the form of mean and 68% confidence limits on the parameters and also highlight the degeneracy between lambda and Q(P) in our analysis. From this analysis we show how warm inflation parameters can be well constrained using the Planck 2015 data.

引用

页数：24

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