Distinguishing Fuzzballs from Black Holes through Their Multipolar Structure

被引：67

作者：

Bianchi, Massimo ^{[1
,2
]}

Consoli, Dario ^{[3
]}

Grillo, Alfredo ^{[1
,2
]}

Morales, Jose Francisco ^{[1
,2
]}

Pani, Paolo ^{[4
,5
]}

Raposo, Guilherme ^{[4
,5
]}

机构：

[1] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

[2] Sez INFN Roma2, Via Ric Sci 1, I-00133 Rome, Italy

[3] Univ Vienna, Math Phys Grp, Boltzmanngasse 5, A-1090 Vienna, Austria

[4] Sapienza Univ Roma, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[5] Sez INFN Roma1, Piazzale Aldo Moro 5, I-00185 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 22期

基金：

奥地利科学基金会; 欧盟地平线“2020”;

关键词：

TESTING GENERAL-RELATIVITY; MOMENTS; BODY;

D O I：

10.1103/PhysRevLett.125.221601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Within general relativity, the unique stationary solution of an isolated black hole is the Kerr spacetime, which has a peculiar multipolar structure depending only on its mass and spin. We develop a general method to extract the multipole moments of arbitrary stationary spacetimes and apply it to a large family of horizonless microstate geometries. The latter can break the axial and equatorial symmetry of the Kerr metric and have a much richer multipolar structure, which provides a portal to constrain fuzzball models phenomenologically. We find numerical evidence that all multipole moments are typically larger (in absolute value) than those of a Kerr black hole with the same mass and spin. Current measurements of the quadrupole moment of black-hole candidates could place only mild constraints on fuzzballs, while future gravitational-wave detections of extreme mass-ratio inspirals with the space mission LISA will improve these bounds by orders of magnitude.

引用

页数：7

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