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arXiv 2401.00835gr-qc
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若干暴胀模型的观测预言

Observational predictions of some inflationary models

Daniel Pozo, Lenin Calvache, Esteban Orozco, Vicente A. Arévalo, Clara Rojas

AI总结:

本文利用CAMB和Cobaya对Starobinsky、广义Starobinsky及带台阶混沌暴胀模型进行CMB角功率谱计算、参数约束与贝叶斯分析,并给出$(n_\sca,r)$等高线图。

摘要:

本文给出了使用CAMB程序对三种不同暴胀模型计算得到的宇宙微波背景(CMB)角功率谱:Starobinsky暴胀模型、广义Starobinsky暴胀模型以及带台阶的混沌暴胀模型。结果与Planck任务报告的最新数据进行了比较。我们对大角尺度($\ell \lesssim 90$)、中等角尺度($90 \lesssim \ell \lesssim 900$)和小角尺度($\ell \gtrsim 900$)进行了分析。我们报告了中等区域中峰的位置,以及每个模型所得到的宇宙学参数:宇宙年龄、$Ω_m$、$Ω_b$、$Ω_Λ$、$Ω_K$和$n_\sca$。我们还使用Cobaya程序进行了贝叶斯分析,以评估我们的三个最佳拟合模型。此外,我们为暴胀模型生成了$(n_\sca,r)$等高线图,并考虑了暴胀结束与再加热完成之间的e-fold数。

英文摘要:

This paper presents the CMB angular power spectrum obtained using the \texttt{CAMB} code for three different models of inflation: the Starobinsky inflationary model, the generalized Starobinsky inflationary model, and the chaotic inflationary model with a step. The results are compared with the most recent data reported for the Planck mission. An analysis of the large ($\ell \lesssim 90$), intermediate ($90 \lesssim \ell \lesssim 900$), and small ($\ell \gtrsim 900 $) angular scales is performed. We report the position of the peaks in the intermediate region so as the cosmological parameters obtained in each of the models: age of the universe, $Ω_m$, $Ω_b$, $Ω_Λ$, $Ω_K$ and $n_\sca$. We also perform a Bayesian analysis using the \texttt{Cobaya} code to evaluate our three best-fitting models. Additionally, we generated contour plots $(n_\sca,r)$ for our inflationary models, taking into account the number of e-folds between the end of inflation and the completion of reheating.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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