Equation 16 · Part 1 · A Neutron Star Is a Redshift Standard
Symbol Phi_s
What this part means
Ph is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
Ph is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol Phi_s→Article meaning
The passage around this formula
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 / 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 =(-1.52.31.5)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…
Learn the underlying idea
A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.
Open the illustrated subscripts: which member of a family? guide →
See this notation across published equations →
Sources cited in the surrounding passage
- [13] MICROSCOPE Mission: Final Results of the Test of the Equivalence Principle ↗
- [11] Equivalence Principle Violations and Couplings of a Light Dilaton ↗
These citations provide research context; check each source for the exact claim it supports.