Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.180..491c&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 180, Sept. 1977, p. 491-494.
Astronomy and Astrophysics
Astronomy
25
Astronomical Models, Stellar Mass Accretion, Comets, Galactic Evolution, Gravitational Effects, Perturbation Theory, Planetary Evolution, Stagnation Point, Steady State, Stellar Evolution, Stellar Models
Scientific paper
The Bondi-Hoyle-Lyttleton (1944) accretion model is considered which involves accretion onto a massive body moving at a high Mach number with respect to the ambient medium and the production of a high-density accretion column along the axis where particle orbits intersect. The stability of steady-state solutions with respect to short-wavelength perturbations is analyzed using the WKB approximation, and the accretion column is shown to be unstable toward such perturbations. It is noted that this instability is not affected by the position of the stagnation point in the steady-state solution.
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