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Early accretion onset in long-period isolated pulsars

Published online by Cambridge University Press:  27 February 2024

M.D. Afonina Open the ORCID record for M.D. Afonina [Opens in a new window] ,
A.V. Biryukov  and
S.B. Popov
M.D. Afonina*
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskij pr. 13, 119234, Moscow, Russia Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie Gory, Moscow, 119991, Russia
A.V. Biryukov
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskij pr. 13, 119234, Moscow, Russia Faculty of Physics, HSE University, 21/4 Staraya Basmannaya str., Moscow, 105066, Russia Kazan Federal University, 18 Kremlyovskaya str., Kazan, 420008, Russia
S.B. Popov
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskij pr. 13, 119234, Moscow, Russia ICTP-Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, I-34151 Trieste, Italy
*
Corresponding author: M.D. Afonina; Email: afonina.md19@physics.msu.ru.
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Abstract

We model long-term magneto-rotational evolution of isolated neutron stars (INSs) with long initial spin periods. This analysis is motivated by the recent discovery of young long-period neutron stars (NSs) 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 INSs with velocities ${\lesssim}100$ 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 NSs with long initial spin periods form a relatively large fraction of all Galactic NSs then the number of isolated accretors is substantially larger than it has been predicted by previous studies.

Keywords

accretionBondi accretioncompact objectsneutron starspulsars
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 41 , 2024 , e014
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of Astronomical Society of Australia

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