Magnetized accretion disks around Kerr black holes with scalar hair: Nonconstant angular momentum disks

被引：13

作者：

Gimeno-Soler, Sergio ^{[1
]}

Font, Jose A. ^{[1
,2
]}

Herdeiro, Carlos ^{[3
,4
]}

Radu, Eugen ^{[3
,4
]}

机构：

[1] Univ Valencia, Dept Astron & Astrofis, C Dr Moliner 50, Burjassot 46100, Valencia, Spain

[2] Univ Valencia, Observatori Astron, C Catedrat Jose Beltran 2, Paterna 46980, Valencia, Spain

[3] Univ Aveiro, Dept Matemat, Campus Santiago, P-3810183 Aveiro, Portugal

[4] Ctr Res & Dev Math & Applicat CIDMA, Campus Santiago, P-3810183 Aveiro, Portugal

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 10期

基金：

欧盟地平线“2020”;

关键词：

THICK DISCS;

D O I：

10.1103/PhysRevD.104.103008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new equilibrium solutions of stationary models of magnetized thick disks (or tori) around Kerr black holes with synchronized scalar hair. The models reported here largely extend our previous results based on constant radial distributions of the specific angular momentum along the equatorial plane. We introduce a new way to prescribe the distribution of the disk's angular momentum based on a combination of two previous proposals and compute the angular momentum distribution outside the equatorial plane by resorting to the construction of von Zeipel cylinders. We find that the effect of the scalar hair on the black hole spacetime can yield significant differences in the disk morphology and properties compared to what is found if the spacetime is purely Kerr. Some of the tori built within the most extreme, background hairy black hole spacetime of our sample exhibit the appearance of two maxima in the gravitational energy density which impacts the radial profile distributions of the disk's thermodynamical quantities. The models reported in this paper can be used as initial data for numerical evolutions with general relativistic magnetohydrodynamic codes to study their stability properties. Moreover, they can be employed as illuminating sources to build shadows of Kerr black holes with scalar hair which might help further constrain the no-hair hypothesis as new observational data are collected.

引用

页数：21

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