On Isolated Millisecond Pulsars Formed by the Coalescence of Neutron Stars and Massive White Dwarfs

Abstract

This paper uses population synthesis to investigate the possible origin of isolated millisecond pulsars (IMSPs) as born from the coalescence of a neutron star (NS) and a white dwarf (WD). Results show that the galactic birth - rate of IMSPs is likely to lie between $5.8\times 10^{-5}$ $\mathrm{y}{\mathrm{r}}^{-1}$ and $2.0\times 10^{-4}$ $\mathrm{y}{\mathrm{r}}^{-1}$, depending on critical variables, such as the stability of mass transfer via the Roche lobe and the value of kick velocity. In addition to this, this paper estimates that the solar mass of IMSPs can range from $1.5$ and 2.0 $M_{\odot }$, making them more massive than other 'normal' pulsars. Finally, the majority of IMSPs in our simulations have spin periods ranging from several to 20 milliseconds, which is consistent with previous observations.

9 pages, 3 figures, 1 table, Accepted for publication in PASA

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Cited by in corpus (2)

• Magnetars from Neutron Star--White Dwarf Mergers: Application to Fast Radio Bursts
• Formation of twin compact stars in low-mass X-ray binaries: Implications on eccentric and isolated millisecond pulsar populations