Black-Hole Ringdown Frequencies Under a Density Limit: The Computed Shift for Astrophysical Masses

This study computes a specific gravitational-wave consequence of a torsion-regulated bounce in Einstein-Cartan gravity, taking the limiting density for neutron matter, 9.72e+54 grams per cubic centimetre under the stated prescription, as its single input scale. Ringdown spectroscopy is becoming a precision test of the Kerr geometry; this study computes whether a cosmological density limit of the kind considered here leaves any imprint on the ringdown of astrophysical black holes. The headline results of the computation are: fiducial_mass_Msun = 30, f0_Hz = 4.02e+03, relative_shift = 2.11e-42, absolute_shift_Hz = 8.48e-39. Each quantity is evaluated by the deposited script from the assumptions stated in the Methods, and the agreement or disagreement of each quantity with published observational bounds is reported at face value, including where the conclusion is that the channel examined is closed. The study is simulated and computed from stated assumptions; it is not a measurement, and no observational data were taken for it.