Models of rotating boson stars and geodesics around them: New type of orbits

被引：75

作者：

Grandclement, Philippe ^{[1
]}

Some, Claire ^{[1
]}

Gourgoulhon, Eric ^{[1
]}

机构：

[1] Univ Paris Diderot, Observ Paris, CNRS, F-92190 Meudon, France

来源：

PHYSICAL REVIEW D | 2014年 / 90卷 / 02期

关键词：

GENERAL-RELATIVITY; EQUILIBRIUM; PARTICLES; THEOREM;

D O I：

10.1103/PhysRevD.90.024068

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have developed a highly accurate numerical code capable of solving the coupled Einstein-Klein-Gordon system, in order to construct rotating boson stars in general relativity. Free fields and self-interacting fields, with quartic and sextic potentials, are considered. In particular, we present the first numerical solutions of rotating boson stars with rotational quantum number k = 3 and k = 4, as well as the first determination of the maximum mass of free-field boson stars with k = 2. We have also investigated timelike geodesics in the spacetime generated by a rotating boson star for k = 1, 2 and 3. A numerical integration of the geodesic equation has enabled us to identify a peculiar type of orbit: the zero-angular-momentum ones. These orbits pass very close to the center and are qualitatively different from orbits around a Kerr black hole. Should such orbits be observed, they would put stringent constraints on astrophysical compact objects like the Galactic center.

引用

页数：20

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