Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...307..807g&link_type=abstract
Astronomy and Astrophysics, v.307, p.807-812
Astronomy and Astrophysics
Astrophysics
8
Binaries: Close, Stars: Neutron, Magnetic Field, Evolution
Scientific paper
Accretion changes drastically both the magnetic and spin evolution of neutron stars belonging to binary systems. Heating caused by accretion decreases the conductivity of the neutron star crust and accelerates the magnetic field decay if the currents maintaining this field are concentrated in the crust. The present paper considers this mechanism of the accretion-driven field decay in the case of accretion from the stellar wind of a companion. Such type of accretion is characterized by lower accretion rates (10^-12^Msun_/yr>=˙(M)>=10^-16^Msun_/yr) comparing with accretion due to Roche-lobe overflow. The field decay accompaning the wind accretion is substantially slower but, nevertheless, it can strongly reduce the field strength of the neutron star because in some binaries the duration of the wind accretion phase is as long as ~10^9^yr. An influence of the wind on the spin evolution seems to be less pronounced. Our computations show that the neutron star cannot reach periods shorter than ~0.5s even for a long accretion phase.
Geppert Ulrich
Konenkov Denis
Urpin Vadim
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