Fitting S2's orbit with a Schwarzschild-constrained neural network yields Λ ≤ 5.67×10^-40 m^-2, but the quoted bound is a residual of the fit rather than an independent measurement.
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Constraining the Cosmological Constant from Stellar Orbits Around Sgr A* Using Physics-Informed Neural Networks
Fitting S2's orbit with a Schwarzschild-constrained neural network yields Λ ≤ 5.67×10^-40 m^-2, but the quoted bound is a residual of the fit rather than an independent measurement.