Published equation contexts

$\Phi_s/c^2$

Why this formula appears here

That test would not be a marginal addition to existing equivalence-principle work. The emitting atoms on a neutron-star surface sit in a gravitational potential $\Phi_s$ / $c^2$ of order 0.2 to 0.4 — a QCD-dominated binding environment seven to eight orders of magnitude deeper than anything a terrestrial free-fall experiment reaches. MICROSCOPE’s satellite test of the weak equivalence principle, the most precise ever flown, bounds a titanium-platinum pair’s differential free fall at $\eta$ =(-1.5 $\pm$ 2.3 $\pm$ 1.5) $\times$ 10^{-15} [ 13 ] , but at a potential difference near 10^{-10} — many orders shallower than a neutron star’s surface. In the dilaton-coupling framework Thibault Damour and John Donoghue laid…

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\Phi_s

Symbol Phi_s

Ph $i_s$ is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

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c^2

Symbol c^2

The square of c: multiply c by itself.

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How to interpret it

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Published contexts (1)

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\Phi_s/c^2

Equation 16 · Crossed Fields

A Neutron Star Is a Redshift Standard

This mathematical expression combines the displayed quantities; its precise role follows from the surrounding article text.

That test would not be a marginal addition to existing equivalence-principle work. The emitting atoms on a neutron-star surface sit in a gravitational potential $\Phi_s$ / $c^2$ of order 0.2 to 0.4 — a QCD-dominated binding environment seven to eight orders of magnitude deeper than anything a terrestrial free-fall experiment reaches. MICROSCOPE’s satellite test of the weak equivalence principle, the most precise ever flown, bounds a titanium-platinum pair’s differential free fall at $\eta$ =(-1.5 $\pm$ 2.3 $\pm$ 1.5) $\times$ 10^{-15} [ 13 ] , but at a potential difference near 10^{-10} — many orders shallower than a neutron star’s surface. In the dilaton-coupling framework Thibault Damour and John Donoghue laid…

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Φs/c2\Phi_s/c^2Φs​/c2