What if Planet 9 is a Primordial Black Hole?

被引：72

作者：

Scholtz, Jakub ^{[1
]}

Unwin, James ^{[2
,3
,4
,5
]}

机构：

[1] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England

[2] Univ Illinois, Dept Phys, Chicago, IL 60607 USA

[3] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[4] LBNL, Theoret Phys Grp, Berkeley, CA 94720 USA

[5] Math Sci Res Inst, 1000 Centennial Dr, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 05期

基金：

美国国家科学基金会;

关键词：

DARK-MATTER; DISCOVERY; ACCRETION;

D O I：

10.1103/PhysRevLett.125.051103

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We highlight that the anomalous orbits of trans-Neptunian objects (TNOs) and an excess in microlensing events in the 5-year Optical Gravitational Lensing Experiment data set can be simultaneously explained by a new population of astrophysical bodies with mass several times that of the Earth (M-circle plus). We take these objects to be primordial black holes (PBHs) and point out the orbits of TNOs would be altered if one of these PBHs was captured by the Solar System, inline with the Planet 9 hypothesis. Capture of a free floating planet is a leading explanation for the origin of Planet 9, and we show that the probability of capturing a PBH instead is comparable. The observational constraints on a PBH in the outer Solar System significantly differ from the case of a new ninth planet. This scenario could be confirmed through annihilation signals from the dark matter microhalo around the PBH.

引用

页数：7

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