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Observational constraints on the generalized $α$ attractor model

Institute for Advanced Physics and Mathematics, Zhejiang University of Technology, Hangzhou, P. R. China

Corresponding author.

Eurasian International Center for Theoretical Physics, Department of General and Theoretical Physics, Eurasian National University, Astana, Kazakhstan

E-mail Address: rmyrzakulov@gmail.com

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Shynaray Myrzakul

Department of Theoretical and Nuclear Physics, Al-Farabi Kazakh National University, Al-Farabi Almaty, Kazakhstan

E-mail Address: shynaray1981@gmail.com

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, and

Anzhong Wang

Institute for Advanced Physics and Mathematics, Zhejiang University of Technology, Hangzhou, P. R. China

GCAP-CASPER, Department of Physics, Baylor University, Waco, Texas, USA

E-mail Address: Anzhong_Wang@baylor.edu

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https://doi.org/10.1142/S021827181850058XCited by:13 (Source: Crossref)

Abstract

We study the generalized $α$ attractor model in the context of the late time cosmic acceleration. The model interpolates between the scaling freezing and thawing dark energy models. In the slow roll region, the original potential is modified whereas the modification ceases in the asymptotic region and the effective potential behaves as the quadratic one. In our setting, the field rolls slowly around the present epoch and mimics the scaling behavior in the future. We obtain observational constraints on the model parameters by using an integrated database (SN+Hubble+BAO+CMB).

Keywords:

PACS: 95.36.+x, 98.80.−k, 98.80.Es

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