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- Title
Brown dwarfs in Eddington-inspired Born-Infeld and beyond Horndeski theories.
- Authors
Rosyadi, A. S.; Sulaksono, A.; Kassim, H. A.; Yusof, N.
- Abstract
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 1 σ and 5 σ confidence by using chi-squared analysis. Furthermore, the minimum chi-squared values can be reached for the cases of κ = 0.17 × 10 2 m 5 kg - 1 s - 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.
- Subjects
BROWN dwarf stars; DEUTERIUM
- Publication
European Physical Journal C -- Particles & Fields, 2019, Vol 79, Issue 12, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-019-7560-3