the action of the gauge group of QST on a neutral scalar field, and derive the interaction of the latter with the electromagnetic field by the covariant derivative prescription. Moreover, we show that such interaction can be described in terms of a magnetic moment associated to the scalar neutral field. Then, in Sec. 2, we evaluate the electromagnetic energy emitted in a state describing the precession of a stellar member of a collapsing binary system; that energy being computed, once the magnetic moment is evaluated, according to classical electrodynamics. We also comment on another manifestation of that magnetic moment, at first glance potentially giving rise to more visible effects, as they would be only quadratic in the Planck length (but hard to be detected anyway, see comments below): the electromagnetic (besides the gravitational) deviations of charged particles by a massive stellar object of dark matter interposed between us and a distant source. But in the case of the previously used data, we find a contribution to the angular deviation of the order $10^{-34}$.

The magnetic moment of a neutral scalar field induced by Quantum Spacetime
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The model of QST adopted here is suggested by the Principle of $Gravitational$ $Stability$ 