Brown dwarfs in Eddington-inspired Born-Infeld and beyond Horndeski theories

Rosyadi, A.S. and Sulaksono, A. and Kassim, Hasan Abu and Yusof, Norhasliza (2019) Brown dwarfs in Eddington-inspired Born-Infeld and beyond Horndeski theories. The European Physical Journal C, 79 (12). p. 1030. ISSN 1434-6044, DOI

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We studied herein the mass and the radius of brown dwarfs predicted by beyond Horndeski (BH) and Eddington-inspired Born-Infeld (EiBI) gravity theories by numerically solving the modified non-relativistic hydrostatic equations of both theories. We used a recent compilation of brown dwarf masses and radii obtained from Ref. Bayliss et al. (Astrophys J 153:1, 2016) to constrain the free parameter of both theories. We obtain the range of the corresponding parameters with 1σ and 5σ confidence by using chi-squared analysis. Furthermore, the minimum chi-squared values can be reached for the cases of κ=0.17×102m5kg-1s-2 and γ= - 0.1207 for EiBI and BH theories, respectively. The corresponding parameter values with the minimum chi-squared values are relatively small; therefore, they cannot significantly change the brown dwarf mass limits determined from the equivalence of nuclear and photosphere luminosities for the pp (hydrogen burning) and pp+pd (deuterium burning) reactions. © 2019, The Author(s).

Item Type: Article
Funders: Q1Q2 grant No. NKB-0267/UN2.R3.1/HKP.05.00/2019, Fundamental Research Grant Scheme (FP042-2018 A) under Ministry of Education
Uncontrolled Keywords: Gravitation; Scalars; Horndeski theories
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 29 Jan 2020 05:37
Last Modified: 29 Jan 2020 05:37

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