Journal Article

Magnetic and spin evolution of neutron stars in close binaries

V. Urpin, U. Geppert and D. Konenkov

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 295, issue 4, pages 907-920
Published in print April 1998 | ISSN: 0035-8711
Published online April 1998 | e-ISSN: 1365-2966 | DOI:
Magnetic and spin evolution of neutron stars in close binaries

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The evolution of neutron stars in close binary systems with a low-mass companion is considered, assuming the magnetic field to be confined within the solid crust. We adopt the standard scenario for the evolution in a close binary system, in which the neutron star passes through four evolutionary phases (‘isolated pulsar’—‘propeller’— accretion from the wind of a companion — accretion resulting from Roche-lobe overflow). Calculations have been performed for a great variety of parameters characterizing the properties of both the neutron star and the low-mass companion. We find that neutron stars with more or less standard magnetic field and spin period that are processed in low-mass binaries can evolve to low-field rapidly rotating pulsars. Even if the main-sequence life of a companion is as long as 1010 yr, the neutron star can maintain a relatively strong magnetic field to the end of the accretion phase. The model that is considered can account well for the origin of millisecond pulsars.

Keywords: binaries: close; stars: magnetic fields; stars: neutron; pulsars: general; X-rays: stars

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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