论文标题
退化高阶标量理论中的中子星
Neutron stars in degenerate higher-order scalar-tensor theories
论文作者
论文摘要
我们在简单的归纳高阶标量（DHOST）理论的简单偏移对称亚家族中研究中子星形构型，其偏离一般相对性（GR）的偏差为单个参数。我们使用中子恒星物质的几个逼真的状态方程来计算这些修饰的重力理论中中子星的径向谱。我们发现具有质量和半径的中子恒星明显大于其GR对应物。然后，我们考虑缓慢旋转的解决方案，并确定无量纲惯性矩与紧凑性，关系的关系，这些关系对状态方程几乎不敏感。
We study neutron star configurations in a simple shift-symmetric subfamily of degenerate higher-order scalar-tensor (DHOST) theories, whose deviations from General Relativity (GR) are characterized by a single parameter. We compute the radial profiles of neutron stars in these theories of modified gravity, using several realistic equations of state for the neutron star matter. We find neutron stars with masses and radii significantly larger than their GR counterparts. We then consider slowly-rotating solutions and determine the relation between the dimensionless moment of inertia and the compactness, relation that has the property to be almost insensitive to the equation of state.
