论文标题
人口II星内部的重力修饰
Modified gravity in the interior of population II stars
论文作者
论文摘要
我们研究了人口II星内部修饰的重力理论超越荷叶州的效果。我们考虑了一个简单的现象学模型，即110万美元的_ {\ odot} $ star，它离开了主序列，具有薄薄的氢燃烧壳，其部分退化的等温核心，周围环绕着具有两个独特不透明度的辐射包膜。使用在两个内部边界处的合适匹配条件，对所得的重力中所得恒星方程进行数值分析。总体而言，重力可能会减弱，导致亮度降低和恒星半径的增加，但这些效果在核心附近逆转。建议该模型在其局限性内如何在修饰的重力参数上产生结合。
We study the effects of a beyond-Horndeski theory of modified gravity in the interior of a population II star. We consider a simple phenomenological model of a $1.1M_{\odot}$ star that has left the main sequence, has a thin Hydrogen burning shell with a partially degenerate isothermal core, surrounded by a radiative envelope having two regions of distinct opacities. Using suitable matching conditions at the two internal boundaries, a numerical analysis of the resulting stellar equations in modified gravity is carried out. While overall, gravity may be weakened, resulting in a decrease of the luminosity and an increase of the radius of the star, these effects are reversed near the core. It is suggested how the model, within its limitations, can yield a bound on the modified gravity parameter.
