SIMBAD references

2022ApJ...932L..17F - Astrophys. J., 932, L17-L17 (2022/June-3)

Implication of Spin Constraints by the Event Horizon Telescope on Stellar Orbits in the Galactic Center.


Abstract (from CDS):

The center of the Milky Way hosts the closest supermassive black hole, Sgr A*. Decades of near-infrared observations of our Galactic Center have shown the presence of a small population of stars (the so-called S-star cluster) orbiting Sgr A*, which were recently reported to be arranged into two orthogonal disks. In this case, the timescale for the Lense-Thirring precession of S stars should be longer than their age, implying a low spin for Sgr A*. In contrast, the recent results by the Event Horizon Telescope favor a highly spinning Sgr A*, which seems to suggest that the S stars could not be arranged in disks. Alternatively, the spin of Sgr A* must be small, suggesting that the models for its observed image are incomplete.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Black holes - Kerr black holes - Galactic center

Simbad objects: 8

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