Prospects for constraining the Yukawa gravity with pulsars around Sagittarius A*

被引：10

作者：

Dong, Yiming ^{[1
,2
]}

Shao, Lijing ^{[2
,3
]}

Hu, Zexin ^{[1
,2
]}

Miao, Xueli ^{[3
]}

Wang, Ziming ^{[1
,2
]}

机构：

[1] Peking Univ, Sch Phys, Dept Astron, 5 Yiheyuan Rd, Beijing 100871, Peoples R China

[2] Peking Univ, Kavli Inst Astron & Astrophys, 5 Yiheyuan Rd, Beijing 100871, Peoples R China

[3] Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2022年 / 11期

基金：

中国国家自然科学基金;

关键词：

radio pulsars; astrophysical black holes; GR black holes; modified gravity; INVERSE-SQUARE LAW; GALACTIC-CENTER; RELATIVISTIC GRAVITY; BLACK-HOLE; TESTS; SEARCHES;

D O I：

10.1088/1475-7516/2022/11/051

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The discovery of radio pulsars (PSRs) around the supermassive black hole (SMBH) in our Galactic Center (GC), Sagittarius A* (Sgr A*), will have significant implications for tests of gravity. In this paper, we predict restrictions on the parameters of the Yukawa gravity by timing a pulsar around Sgr A* with a variety of orbital parameters. Based on a realistic timing accuracy of the times of arrival (TOAs), sigma(TOA) = 100 mu s, and using a number of 960 TOAs in a 20-yr observation, our numerical simulations show that the PSR-SMBH system will improve current tests of the Yukawa gravity when the range of the Yukawa interaction varies between 10(1)-10(4) AU, and it can limit the graviton mass to be m(g) less than or similar to 10(-24) eV/c(2).

引用

页数：18

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