2016/02/29 by Mehdi Es-haghi, Mehdi Eshaghi, Moslem Zarei +3 · 64 citations
Mathematics · Physics and Astronomy · #Astrophysics #Attractor #Consistency (knowledge bases) #Cosmic microwave background #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Geometry #Mathematical analysis #Mathematics #Physics #Planck #Quantum mechanics #Scalar (mathematics) #Solar and Space Plasma Dynamics #Spectral index #Spectral line #astro-ph.CO #hep-th
paper · pdf · doi:10.1103/physrevd.93.123517
published in Physical review. D/Physical review. D. 93(12) (American Physical Society) · 13 pages, 7 figures
arxiv created 2016/02/29 · openalex publication_date 2016/06/13 · arxiv updated 2016/06/22 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
After Planck 2013, a broad class of inflationary models called \ensuremathα-attractors was developed which has universal observational predictions. For small values of the parameter \ensuremathα, the models have good consistency with the recent cosmic microwave background data. In this work, we first calculate analytically (and verify numerically) the predictions of these models for spectral index, ns, and tensor-to-scalar ratio, r, and then, using BICEP2/Keck 2015 and Planck 2015 data, we impose constraints on \ensuremathα-attractors. Then, we study the reheating for \ensuremathα-attractors. The reheating temperature, Tre, and the number of e-folds during reheating, Nre, are calculated as functions of ns. Using these results, we determine the range of the free parameters of two classes of \ensuremathα-attractors which satisfy the constraints of recent cosmic microwave background data.