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Some properties of white-dwarf collapse in low-mass binaries

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Abstract

Conditions for collapse of an accreting white dwarf in a low-mass close binary are analysed. It is shown that if the magnetic strength on the surface of a white dwarf is less than 105–106 G, a rotation barrier appears which prevents the direct formation of a neutron star. As a result, a time-scale for the collapse is defined by a specific time of momentum dissipation rather than by free-fall time-scale. It is noted that a tidal deformation of a white dwarf, intensified in a process of collapse, renders collapse in a low-mass close binary sharply anisotropic. Consequently fast moving radiopulsars can arise with velocities of some thousands km s−1.

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  1. Shternberg Astronomical Institute, Moscow, U.S.S.R.

    V. M. Lipunov

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  1. V. M. Lipunov
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Lipunov, V.M. Some properties of white-dwarf collapse in low-mass binaries. Astrophys Space Sci 97, 121–126 (1983). https://doi.org/10.1007/BF00684614

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  • DOI: https://doi.org/10.1007/BF00684614

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