TY - JOUR
T1 - An Upper Limit on the Spin of SgrA∗ Based on Stellar Orbits in Its Vicinity
AU - Fragione, Giacomo
AU - Loeb, Abraham
N1 - Publisher Copyright:
© 2020. The American Astronomical Society.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - 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° 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 χ ≲ 0.1.
AB - 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° 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 χ ≲ 0.1.
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U2 - 10.3847/2041-8213/abb9b4
DO - 10.3847/2041-8213/abb9b4
M3 - Article
AN - SCOPUS:85092921524
SN - 2041-8205
VL - 901
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 2
M1 - abb9b4
ER -