Validation: merger bookkeeping
Source: src/morrigan/merge_embryo.py. Tests: tests/test_merge_embryo.py.
| Test | Pin | Authority |
|---|---|---|
test_collision_velocity_floors_at_the_mutual_escape_speed |
v_c equals the mutual escape speed exactly for circular orbits; the eccentric case pinned at 11945.7 m/s | The sqrt(v_inf^2 + v_esc^2) contact-speed convention (analytical limit) |
test_merger_closes_its_mass_and_orbit_books |
The merged orbit lands at (M1+M2)/(M1/a1 + M2/a2), 1.05882 au for the reference pair | Kimura et al. (2025), eq. 16 |
Guards: the wrong linear combination v_inf + v_esc, and the arithmetic-mean and mass-weighted-mean wrong orbits. Exact mass closure on the plain sum, mass-based survivor selection, and the eq. 17 eccentricity composition bounds are asserted alongside.