Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...225..137r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 225, no. 1, Nov. 1989, p. 137-142. Research supported by DFG.
Astronomy and Astrophysics
Astrophysics
2
Magnetohydrodynamics, Neutron Stars, Radiative Transfer, Stellar Mass Accretion, X Ray Binaries, Accretion Disks, Boundary Conditions, Differential Equations, Frequency Distribution, Integral Equations, Stellar Atmospheres
Scientific paper
A self-consistent time-independent model of accretion columns on strongly magnetized neutron stars is presented. The important role of the boundary condition at the bottom of the column is pointed out. The motion of the plasma influences strongly the spectra and beam shapes of the emitted radiation. A large amount of the radiation from the column hits the surface of the neutron star and forms a luminous area ('halo') around the bottom of the column. As a further result the maximum accretion rate for stationary solutions has been determined. Furthermore we discuss the limit of applicability of the diffusion approximation, which depends strongly on the plasma velocity.
Bock U.
Herold Heinz
Kraus Ute
Maile T.
Rebetzky A.
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