SIMBAD references

2021MNRAS.501.2418S - Mon. Not. R. Astron. Soc., 501, 2418-2423 (2021/February-3)

A numerical study of Galactic Centre stars.

SALCIDO O. and CALCANEO-ROLDAN C.

Abstract (from CDS):

We present a simulation of the orbits of Galactic Centre stars, also known as 'S-stars', with the purpose of describing the motion of those bodies for which complete orbits are known with greater accuracy. The aim is to have a better understanding of the inner parts of the Galactic potential. The simulation assumes that the spacetime around the central black hole of the Galaxy may be modelled by the Schwarzschild metric, while stellar interactions are approximated classically. We model the central object as a black hole with mass 4.31 x 106 M, fix the Galactic Centre distance at R = 8.33 kpc and include 37 orbiting stars, all of which have masses of 10 M, except for S2, which has a mass of 20 M. Our method allows us to predict the semimajor axis, a; eccentricity, ε; and period, T for these stars and predict their periastron shift, δΘ. In particular for S2, the most scrutinized star, we find δΘ = 11.9342 arcmin, in strong agreement with the observed value.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): black hole physics - methods: numerical - stars: kinematics and dynamics - Galaxy: centre

Simbad objects: 40

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2021.12.02-07:22:59

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