Survival Separation for a Neutron Star Engulfed by an Eight-Solar-Mass Asymptotic Giant

This paper examines an eight-solar-mass asymptotic giant branch star, core mass 1.05 solar masses and envelope mass 6.95 solar masses at 480 solar radii, engulfing a 1.40 solar-mass neutron star. Using published input values and the standard energy comparison between envelope binding and orbital release, the calculation addresses the specific budget that decides the outcome for this pairing. The headline results are: binding_energy_erg = 1.098e+48; alpha_required = 9.632; af_alpha_0.5_Rsun = 1.25. The method, inputs and limitations are stated in full so that any reader can reproduce or rescale every number from the deposited calculation script. A neutron star inside a massive giant is an extreme test of ejection. Agreement and disagreement with published values for this class are reported at their actual size, and the conclusions are limited to what the budget arithmetic supports.