论文标题

缓慢旋转中子星的巨大标量张量重力中的强场作用,并应用于X射线脉冲星脉冲轮廓

Strong-field effects in massive scalar-tensor gravity for slowly spinning neutron stars and application to X-ray pulsar pulse profiles

论文作者

Xu, Rui, Gao, Yong, Shao, Lijing

论文摘要

标量调整器(ST)重力理论中的中子星(NSS)可以通过自发标量的著名现象获得标量电荷并从一般相对(GR)中产生明显的空间。使用标量场的质量项来实现ST理论,我们通过研究线性标量场方程来确定自发标量的理论参数空间。然后获得了缓慢旋转NS的完整数值解,并详细研究并进行了研究。所得的时空用于计算测试粒子的大地学。光明的测量学用于从标量NSS表面的一对热点构建X射线辐射的轮廓,可以将其与中Neutron Star Interior Coption Explorer(NECER)任务的数据进行比较,以测试ST理论。

Neutron stars (NSs) in scalar-tensor (ST) theories of gravitation can acquire scalar charges and generate distinct spacetimes from those in General Relativity (GR) through the celebrated phenomenon of spontaneous scalarization. Taking on an ST theory with the mass term of the scalar field, we determine the theory parameter space for spontaneous scalarization by investigating the linearized scalar field equation. Then the full numerical solutions for slowly rotating NSs are obtained and studied in great detail. The resulted spacetime is used to calculate test-particle geodesics. The lightlike geodesics are used to construct the profile of X-ray radiation from a pair of hot spots on the surface of scalarized NSs, which potentially can be compared with the data from the Neutron star Interior Composition Explorer (NICER) mission for testing the ST theory.

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