Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.275.1117u&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 275, Issue 4, pp. 1117-1124.
Astronomy and Astrophysics
Astronomy
45
Mhd, Stars: Interiors, Stars: Magnetic Fields, Stars: Neutron
Scientific paper
The weak magnetic field of many old pulsars entering binary systems strongly supports the idea of the field decay in those objects. The present paper considers a mechanism for fast field decay associated with additional heating of the neutron star during the mass transfer phase. Heating decreases the conductivity of the neutron star crust and may be responsible for an acceleration of the magnetic field decay if the currents maintaining this field are concentrated in the crust. The field strength at the end of the accretion phase depends on both the total amount of the accreted mass, DeltaM, and the accretion rate, M_solar. Computations have been performed for a wide range of accretion rates and durations of the accretion phase. The dependence of the field on the accreted mass can be fitted by a simple power law, B~DeltaM^-gamma with gamma~=0.8, for relatively high values of DeltaM, Delta
Geppert Ulrich
Urpin Vadim
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