AWhat changed
Bondi solves the steady spherical polytropic accretion problem, identifies subsonic and critical transonic branches, and derives the mass-rate scaling and critical coefficient under an explicit inner-domain assumption.
Scientific scope
Bondi solves the steady spherical polytropic accretion problem, identifies subsonic and critical transonic branches, and derives the mass-rate scaling and critical coefficient under an explicit inner-domain assumption. The family assumes steady spherical Newtonian flow onto a fixed central mass, a polytropic gas at rest at infinity and 1<=gamma<=5/3. Rotation, self-gravity and mass growth are omitted. The critical rate depends on the inner-boundary domain; steady equations alone do not select it. The isothermal and gamma=5/3 endpoints require their own limits. The source’s energy/stability selection and moving-star interpolation are provisional, not universal proven theorems.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- H. Bondi · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- H. Bondi 1952, On spherically symmetrical accretion, completeoriginal 195-204
- RAS/Oxford 1952 original bibliographicidentity/abstract
- Philip J. Armitage 2020: Bondi’s accretion model as a continuing astrophysical reference
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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