Stage IV CMB forecasts for warm inflation

IF 5.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
F.B.M. dos Santos, G. Rodrigues, R. de Souza and J.S. Alcaniz
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Abstract

We report forecast constraints on warm inflation in the light of future cosmic microwave background (CMB) surveys, with data expected to be available in the coming decade. These observations could finally give us the missing information necessary to unveil the production of gravitational waves during inflation, reflected by the detection of a non-zero tensor-to-scalar ratio crucial to the B-mode power spectrum of the CMB. We consider the impact of three future surveys, namely the CMB-S4, Simons Observatory, and the space-borne LiteBIRD, in restricting the parameter space of four typical warm inflationary models in the context of a quartic potential, which is well motivated theoretically. We find that all three surveys significantly improve the models' parameter space, compared to recent results obtained with current Planck+BICEP/Keck Array data. Moreover, the combination of ground-based and space-borne (SO+LiteBIRD and CMB-S4+LiteBIRD) surveys tightens the constraints so that we expect to distinguish even better warm inflation scenarios. This result becomes clear when we compare the models' predictions with a ΛCDM+r forecast, compatible with r = 0, in which one of them already becomes excluded by data.
第四阶段CMB对热通胀的预测
根据未来的宇宙微波背景(CMB)调查,我们报告了对热暴胀的预测约束,预计数据将在未来十年获得。这些观测结果可能最终为我们揭示暴胀过程中引力波产生的必要信息,通过检测到对CMB的b模功率谱至关重要的非零张量与标量比来反映。我们考虑了CMB-S4、Simons天文台和星载LiteBIRD这三个未来巡天对四种典型热暴胀模型在四次势背景下的参数空间限制的影响,这在理论上是有很好的动机的。我们发现,与目前使用普朗克+BICEP/Keck阵列数据获得的结果相比,这三次巡天都显著改善了模型的参数空间。此外,陆基和星载(SO+LiteBIRD和CMB-S4+LiteBIRD)调查的结合加强了限制,因此我们期望区分更好的热膨胀情景。当我们将模型的预测与与r = 0兼容的ΛCDM+r预测进行比较时,这个结果变得清晰,其中一个已经被数据排除在外。
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来源期刊
Journal of Cosmology and Astroparticle Physics
Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理
CiteScore
10.20
自引率
23.40%
发文量
632
审稿时长
1 months
期刊介绍: Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.
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