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ONe WD+He star systems as the progenitors of IMBPs

Published online by Cambridge University Press:  30 December 2019

Bo Wang  and
Dongdong Liu
Bo Wang
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China email: [email protected] Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
Dongdong Liu
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, China email: [email protected] Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China
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Abstract

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Previous theoretical studies can only explain part of the observed intermediate-mass binary pulsars (IMBPs) with short orbital periods. Note that an ONe white dwarf (WD) accreting mass from a He star may experience the accretion-induced collapse process and eventually form IMBPs, known as the ONe WD+He star scenario. By investigating the evolution of a large number of ONe WD+He star binaries, we found that the ONe WD+He star scenario can form IMBPs including pulsars with 5 – 340 ms spin periods, and the orbital periods range from 0.04 to 900 d. Compared with the observed IMBPs, this scenario can cover almost all of the IMBPs with short orbital periods. Thus, we suggest that the ONe WD+He star channel is responsible for the formation of IMBPs with short orbital periods.

Keywords

binaries: closestars: evolutionwhite dwarfsstars: neutron
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S346: High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects , August 2018 , pp. 478 - 479
Copyright
© International Astronomical Union 2019 

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