Pressure gradient torque in a non-axisymmetric accretion

Details Pressure gradient torque in a non-axisymmetric accretion Pressure gradient torque in a non-axisymmetric accretion

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236..299h&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Jan. 15, 1989, p. 299-318. Research sponsored by D

Statistics

Computation

5

Computational Astrophysics, Momentum Transfer, Pressure Gradients, Stellar Mass Accretion, Stellar Winds, X Ray Binaries, Angular Momentum, Error Analysis, Perturbation Theory

Scientific paper

Angular momentum transfer in nonaxisymmetric supersonic accretion is investigated, with special attention given to the pressure gradient torque applied to the accreted flow by the passing wind. Under plausible assumptions for the functional forms of the perturbation, the pressure gradient torque is shown to be nonnegligible compared with the angular momentum carried by the mass entering the accretion column. For the case of X-ray binary systems fed by a steady-state wind, the Dodd-McCrea (1952) torque resulting from the density/velocity gradient induced by the binary geometry will tend to align the compact object with the orbital angular momentum.

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