An Upper Limit on the Spin of SgrA* Based on Stellar Orbits in Its Vicinity

被引：65

作者：

Fragione, Giacomo ^{[1
,2
]}

Loeb, Abraham ^{[3
]}

机构：

[1] Ctr Interdisciplinary Explorat & Res Astrophys CI, Evanston, IL 60202 USA

[2] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60202 USA

[3] Harvard Univ, Astron Dept, 60 Garden St, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2020年 / 901卷 / 02期

关键词：

Astrophysical black holes; black hole physics; Kerr black holes; Supermassive black holes; Galactic center; S stars; BLACK-HOLES;

D O I：

10.3847/2041-8213/abb9b4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spin of the massive black hole (BH) at the center of the Milky Way, SgrA*, has been poorly constrained so far. We place an upper limit on the spin of SgrA* based on the spatial distribution of the S-stars, which are arranged in two almost edge-on disks that are located at a position angle of approximately 45 degrees with respect to the Galactic plane, on a milliparsec scale around the Galactic center. Requiring that the frame-dragging precession has not had enough time to make the S-star orbital angular momentum precess, the spin of the massive BH at the center of the Milky Way can be constrained to chi less than or similar to 0.1.

引用

页数：3

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