Stability of the magnetospheric boundary of a neutron star undergoing spherical accretion.

Details Stability of the magnetospheric boundary of a neutron star undergoing spherical accretion. Stability of the magnetospheric boundary of a neutron star undergoing spherical accretion.

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...312..338i&link_type=abstract

Astronomy and Astrophysics, v.312, p.338-344

Astronomy and Astrophysics

Astrophysics

12

Accretion, Mhd, Plasmas, Stars: Neutron Star

Scientific paper

Stability of the magnetospheric boundary of an accreting neutron star is considered. It is shown that the magnetic field lines in the magnetopause of a rotating neutron star are sheared in the azimuthal direction by plasma penetrating the magnetosphere at the Alfven surface. The stabilizing influence of the magnetic field shear is estimated. We find that the magnetospheric boundary of a neutron star undergoing spherical accretion is stable with respect to interchange type instabilities if the spin period of the neutron star is P_s_<=10^3^s. This result is valid also for the case of quasispherical accretion if the relative velocity of the magnetosphere surface with respect to surrounding plasma is V_rel_>10^6^cm/s.

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