Periastron Advance in the Double Pulsar J0737-3039 and the Masses It Determines

This paper computes the periastron advance for the double pulsar PSR J0737-3039A/B within a torsion-regulated gravitational frame — Einstein-Cartan gravity with the density bound that follows from its spin-torsion term — and compares the result with the best published measurement. The relativistic prediction is 16.9 degrees per year; the published value is 16.9 plus or minus 0.0007 degrees per year, a residual of -0.0004182 degrees per year (-0.5974 standard deviations). Because torsion in this framework is sourced only by spin density and does not propagate, the predicted deviation from general relativity is set by the square root of the ratio of the system density to the bound density, giving a fractional deviation of 8.487e-21 and a correction of 1.434e-19 degrees per year. The measurement bounds any fractional deviation at 0.0001076 (two standard deviations), so the framework passes this test with a headroom factor of 1.268e+16. Stated plainly, the test is consistent with the framework but cannot distinguish it from general relativity; the implied lower bound on the density scale, 6.048e+25 kilograms per cubic metre, lies far below the framework's bound of 9.718e+57 kilograms per cubic metre. The study is computed from stated assumptions and published data; it is simulated, not measured.