期刊
PHYSICAL REVIEW D
卷 102, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.064057
关键词
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资金
- National Natural Science Foundation of China [11975027, 11991053, 11721303]
- Young Elite Scientists Sponsorship Program by the China Association for Science and Technology [2018QNRC001]
- Max Planck Partner Group Program - Max Planck Society
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB23010200]
- Boya Postdoctoral Fellowship at Peking University
- High-performance Computing Platform of Peking University
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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