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- W2996870425 abstract "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 $$sigma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>σ</mml:mi></mml:math> and 5 $$sigma $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>σ</mml:mi></mml:math> confidence by using chi-squared analysis. Furthermore, the minimum chi-squared values can be reached for the cases of $$kappa = 0.17 times 10^2 ~mathrm{m}^5,mathrm{kg}^{-1},mathrm{s}^{-2}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>κ</mml:mi><mml:mo>=</mml:mo><mml:mn>0.17</mml:mn><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mn>2</mml:mn></mml:msup><mml:mspace /><mml:msup><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mn>5</mml:mn></mml:msup><mml:mspace /><mml:msup><mml:mrow><mml:mi>kg</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup><mml:mspace /><mml:msup><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mo>-</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math> and $$gamma = -0.1207$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mi>γ</mml:mi><mml:mo>=</mml:mo><mml:mo>-</mml:mo><mml:mn>0.1207</mml:mn></mml:mrow></mml:math> 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." @default.
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- W2996870425 date "2019-12-01" @default.
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- W2996870425 title "Brown dwarfs in Eddington-inspired Born-Infeld and beyond Horndeski theories" @default.
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