Early Accretion Onset in Long-Period Isolated Pulsars

M. D. Afonina; A. V. Biryukov; S. B. Popov

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arXiv · 2310.14844

Early Accretion Onset in Long-Period Isolated Pulsars

M. D. Afonina·A. V. Biryukov·S. B. Popov

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Abstract

We model long-term magneto-rotational evolution of isolated neutron stars with long initial spin periods. This analysis is motivated by the recent discovery of young long-period neutron stars observed as periodic radio sources: PSR J0901-4046, GLEAM-X J1627-52, and GPM J1839-10. Our calculations demonstrate that for realistically rapid spin-down during the propeller stage isolated neutron stars with velocities $\lesssim100$ km s$^{-1}$ and assumed long initial spin periods can reach the stage of accretion from the interstellar medium within at most a few billion years as they are born already at the propeller stage or sufficiently close to the critical period of the ejector-propeller transition. If neutron stars with long initial spin periods form a relatively large fraction of all Galactic neutron stars then the number of isolated accretors is substantially larger than it has been predicted by previous studies.

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M. D. Afonina, A. V. Biryukov, S. B. Popov. 2023-10-23. Early Accretion Onset in Long-Period Isolated Pulsars. https://arxiv.org/abs/2310.14844

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