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- W4321524261 abstract "Type Ia supernovae (SNe Ia) are successful cosmological distance indicators and important element factories in the chemical evolution of galaxies. They are generally thought to originate from thermonuclear explosions of carbon-oxygen white dwarfs in close binaries. However, the observed diversity among SNe Ia implies that they have different progenitor models. In this article, we performed the long-term evolution of NS+He star binaries with different initial He star masses ($M_{rm He}^{rm i}$) and orbital periods ($P_{rm orb}^{rm i}$) for the first time, in which the He star companions can explode as SNe Ia eventually. Our simulations indicate that after the He stars develop highly degenerate oxygen-neon (ONe) cores with masses near the Chandrasekhar limit, explosive oxygen burning can be triggered due to the convective Urca process. According to these calculations, we obtained an initial parameter space for the production of SNe Ia in the $rm log,$$P^{rm i}_{rm orb}-M^{rm i}_{rm He}$ plane. Meanwhile, we found that isolated mildly recycled pulsars can be formed after He stars explode as SNe Ia in NS+He star binaries, in which the isolated pulsars have minimum spin periods ($P_{rm spin}^{rm min}$) of $sim 30-110rm,ms$ and final orbital velocities of $sim rm 60-360,km,s^{-1}$, corresponding to initial orbital periods of $0.07-10rm,d$. Our work suggests that the NS+He star channel may contribute to the formation of isolated mildly recycled pulsars with velocity $rm lesssim 360,km,s^{-1}$ in observations, and such isolated pulsars should locate in the region of pulsars with massive WD companions in the $P_{rm spin}-dot P_{rm spin}$ diagram." @default.
- W4321524261 created "2023-02-24" @default.
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- W4321524261 date "2023-02-20" @default.
- W4321524261 modified "2023-10-18" @default.
- W4321524261 title "Type Ia supernovae in NS+He star systems and the isolated mildly recycled pulsars" @default.
- W4321524261 doi "https://doi.org/10.48550/arxiv.2302.09925" @default.
- W4321524261 hasPublicationYear "2023" @default.
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